I have multiple users that are experiencing slow logins often enough for it to be really annoying for all involved. All of these users are set up to use DHCP. I believe they all use laptops and are on and off the network, but I haven't been able to confirm that. We have one DNS server and the users are all set up to use that only. I'm not saying that the problem doesn't lie with DNS, though. I've tried upgrading NICs, applying hotfixes, etc. We do use Group Policy but there are only a few policies so I can't imagine that would be the cause (we are a small organization). I have enabled verbose userenv logging and it always shoots back the same error. It does it when the user is logging on, but it also does it sometimes every few minutes (I believe Group Policy is applied every hour or two, correct me if I'm wrong, so again I don't think that's the issue, but I'm not sure). Here is a snippet from one of the userenv logs while a user was logging in:USERENV(91c.928) 12:46:54:101 LibMain: Process Name: C:\WINDOWS\system32\wbem\wmiprvse.exeUSERENV(80c.81c) 12:46:54:591 LibMain: Process Name: C:\Program Files\Intel\Wireless\Bin\ifrmewrk.exeUSERENV(80c.81c) 12:46:54:606 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:54:606 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:54:621 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:54:637 GetUserDNSDomainName: Failed to impersonate userUSERENV(348.810) 12:46:54:667 LibMain: Process Name: C:\Program Files\Intel\Wireless\bin\ZCfgSvc.exeUSERENV(348.810) 12:46:54:683 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:54:683 GetUserNameAndDomain Failed to impersonate userUSERENV(348.810) 12:46:54:683 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:54:683 GetUserDNSDomainName: Failed to impersonate userUSERENV(348.810) 12:46:54:744 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:54:790 GetUserNameAndDomain Failed to impersonate userUSERENV(348.810) 12:46:54:805 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:54:805 GetUserDNSDomainName: Failed to impersonate userUSERENV(348.810) 12:46:54:866 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:54:882 GetUserNameAndDomain Failed to impersonate userUSERENV(348.810) 12:46:54:882 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:54:912 GetUserDNSDomainName: Failed to impersonate userUSERENV(cc4.d5c) 12:46:54:882 LibMain: Process Name: C:\Program Files\Windows Defender\MSASCui.exeUSERENV(3e4.42c) 12:46:54:989 GetProfileType: Profile already loaded.USERENV(3e4.42c) 12:46:55:019 GetProfileType: ProfileFlags is 0USERENV(348.810) 12:46:55:035 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:55:035 GetUserNameAndDomain Failed to impersonate userUSERENV(348.810) 12:46:55:035 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:55:035 GetUserDNSDomainName: Failed to impersonate userUSERENV(348.810) 12:46:55:096 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:55:096 GetUserNameAndDomain Failed to impersonate userUSERENV(348.810) 12:46:55:096 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:55:096 GetUserDNSDomainName: Failed to impersonate userUSERENV(348.810) 12:46:55:096 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:55:096 GetUserNameAndDomain Failed to impersonate userUSERENV(348.810) 12:46:55:096 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:55:096 GetUserDNSDomainName: Failed to impersonate userUSERENV(348.810) 12:46:55:111 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:55:111 GetUserNameAndDomain Failed to impersonate userUSERENV(348.810) 12:46:55:111 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:55:111 GetUserDNSDomainName: Failed to impersonate userUSERENV(348.810) 12:46:55:111 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:55:111 GetUserNameAndDomain Failed to impersonate userUSERENV(348.810) 12:46:55:111 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:55:111 GetUserDNSDomainName: Failed to impersonate userUSERENV(348.810) 12:46:55:142 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:55:142 GetUserNameAndDomain Failed to impersonate userUSERENV(348.810) 12:46:55:142 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:55:142 GetUserDNSDomainName: Failed to impersonate userUSERENV(348.810) 12:46:55:264 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:55:326 GetUserNameAndDomain Failed to impersonate userUSERENV(348.810) 12:46:55:387 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:55:402 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.a00) 12:46:55:417 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.a00) 12:46:55:417 GetUserNameAndDomain Failed to impersonate userUSERENV(518.a00) 12:46:55:417 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.a00) 12:46:55:417 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.a00) 12:46:55:463 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.a00) 12:46:55:463 GetUserNameAndDomain Failed to impersonate userUSERENV(518.a00) 12:46:55:463 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.a00) 12:46:55:463 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.a00) 12:46:55:509 ImpersonateUser: Failed to impersonate user with 5....USERENV(348.810) 12:46:56:014 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:56:091 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:106 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:56:106 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:397 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:56:565 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:565 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:56:581 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:581 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:56:718 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:718 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:56:718 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:718 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:56:764 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:764 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:56:764 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:764 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:56:795 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:795 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:56:795 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:795 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:56:826 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:826 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:56:841 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:841 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:56:841 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:856 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:56:856 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:856 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:56:887 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:887 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:56:902 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:902 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:56:917 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:917 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:56:917 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:917 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:56:933 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:933 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:56:933 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:933 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:56:948 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:948 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:56:948 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:948 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:56:963 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:963 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:56:963 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:56:963 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:56:979 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:57:040 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:57:055 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:57:055 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:57:070 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:57:070 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:57:101 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:57:101 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:57:560 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:57:560 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:57:560 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:57:560 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:57:622 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:57:729 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:57:821 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:57:821 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:57:821 GetUserDNSDomainName: Failed to impersonate userUSERENV(348.810) 12:46:57:821 GetUserNameAndDomain Failed to impersonate userUSERENV(348.810) 12:46:57:821 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:57:821 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:57:821 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:57:821 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:57:821 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:57:821 GetUserDNSDomainName: Failed to impersonate user...USERENV(348.810) 12:46:58:188 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:58:188 GetUserNameAndDomain Failed to impersonate userUSERENV(348.810) 12:46:58:203 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:46:58:203 GetUserDNSDomainName: Failed to impersonate userUSERENV(19c.3a4) 12:46:58:249 LibMain: Process Name: C:\WINDOWS\system32\net.exeUSERENV(158.3a0) 12:46:59:780 LibMain: Process Name: C:\WINDOWS\system32\imapi.exeUSERENV(80c.81c) 12:46:59:795 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:59:795 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:46:59:795 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:46:59:795 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:46:59:948 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:47:00:040 GetUserNameAndDomain Failed to impersonate userUSERENV(d40.34c) 12:47:00:193 LibMain: Process Name: C:\WINDOWS\system32\net.exeUSERENV(80c.81c) 12:47:00:239 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:47:00:239 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:47:01:188 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:47:01:188 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:47:01:203 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:47:01:203 GetUserDNSDomainName: Failed to impersonate userUSERENV(4cc.414) 12:47:01:418 LibMain: Process Name: C:\PROGRA~1\Intel\Wireless\Bin\Dot1XCfg.exeUSERENV(80c.81c) 12:47:01:509 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:47:01:509 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:47:01:509 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:47:01:509 GetUserDNSDomainName: Failed to impersonate userUSERENV(648.b94) 12:47:01:708 LibMain: Process Name: C:\WINDOWS\system32\net.exeUSERENV(9f8.f78) 12:47:02:443 LibMain: Process Name: C:\WINDOWS\system32\ctfmon.exeUSERENV(9f8.f78) 12:47:02:489 GetProfileType: Profile already loaded.USERENV(9f8.f78) 12:47:02:489 GetProfileType: ProfileFlags is 0USERENV(fbc.fc0) 12:47:02:550 LibMain: Process Name: C:\WINDOWS\system32\net.exeUSERENV(1d8.248) 12:47:03:637 LibMain: Process Name: C:\WINDOWS\system32\net.exeUSERENV(2d0.1c0) 12:47:04:402 LibMain: Process Name: C:\WINDOWS\system32\net.exeUSERENV(e4.138) 12:47:04:418 LibMain: Process Name: C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exeUSERENV(e4.138) 12:47:04:418 ImpersonateUser: Failed to impersonate user with 5.USERENV(e4.138) 12:47:04:418 GetUserNameAndDomain Failed to impersonate userUSERENV(e4.138) 12:47:04:418 ImpersonateUser: Failed to impersonate user with 5.USERENV(e4.138) 12:47:04:418 GetUserDNSDomainName: Failed to impersonate userUSERENV(e4.138) 12:47:04:448 ImpersonateUser: Failed to impersonate user with 5.USERENV(e4.138) 12:47:04:448 GetUserNameAndDomain Failed to impersonate userUSERENV(e4.138) 12:47:04:448 ImpersonateUser: Failed to impersonate user with 5.USERENV(e4.138) 12:47:04:448 GetUserDNSDomainName: Failed to impersonate userUSERENV(958.478) 12:47:05:474 LibMain: Process Name: C:\WINDOWS\system32\net.exeUSERENV(4cc.414) 12:47:06:147 ImpersonateUser: Failed to impersonate user with 5.USERENV(4cc.414) 12:47:06:147 GetUserNameAndDomain Failed to impersonate userUSERENV(4cc.414) 12:47:06:147 ImpersonateUser: Failed to impersonate user with 5.USERENV(4cc.414) 12:47:06:147 GetUserDNSDomainName: Failed to impersonate userUSERENV(dd0.dd4) 12:47:06:255 LibMain: Process Name: C:\WINDOWS\system32\userinit.exeUSERENV(e3c.e54) 12:47:06:346 LibMain: Process Name: C:\WINDOWS\system32\net.exeUSERENV(e2c.c30) 12:47:07:265 LibMain: Process Name: C:\WINDOWS\system32\wuauclt.exeUSERENV(ec4.ea0) 12:47:07:357 LibMain: Process Name: C:\WINDOWS\system32\net.exeUSERENV(80c.81c) 12:47:07:739 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:47:07:739 GetUserNameAndDomain Failed to impersonate user...USERENV(348.810) 12:47:09:102 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:47:09:102 GetUserDNSDomainName: Failed to impersonate userUSERENV(348.810) 12:47:09:117 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:47:09:117 GetUserNameAndDomain Failed to impersonate userUSERENV(348.810) 12:47:09:117 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:47:09:117 GetUserDNSDomainName: Failed to impersonate userUSERENV(348.810) 12:47:09:117 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:47:09:117 GetUserNameAndDomain Failed to impersonate userUSERENV(348.810) 12:47:09:132 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:47:09:132 GetUserDNSDomainName: Failed to impersonate userUSERENV(348.810) 12:47:09:163 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:47:09:163 GetUserNameAndDomain Failed to impersonate userUSERENV(348.810) 12:47:09:178 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.810) 12:47:09:178 GetUserDNSDomainName: Failed to impersonate user...USERENV(348.f74) 12:47:09:194 ImpersonateUser: Failed to impersonate user with 5.USERENV(348.f74) 12:47:09:194 GetUserDNSDomainName: Failed to impersonate userUSERENV(f90.fc0) 12:47:09:530 LibMain: Process Name: C:\WINDOWS\system32\schtasks.exeUSERENV(da4.248) 12:47:09:653 LibMain: Process Name: C:\WINDOWS\system32\schtasks.exeUSERENV(1d8.c34) 12:47:09:714 LibMain: Process Name: C:\WINDOWS\system32\schtasks.exeUSERENV(260.5fc) 12:47:09:791 LibMain: Process Name: C:\WINDOWS\system32\schtasks.exeUSERENV(264.290) 12:47:09:898 LibMain: Process Name: C:\WINDOWS\system32\schtasks.exeUSERENV(3a4.ee0) 12:47:09:959 LibMain: Process Name: C:\WINDOWS\system32\schtasks.exeUSERENV(d00.900) 12:47:10:265 LibMain: Process Name: C:\WINDOWS\system32\schtasks.exeUSERENV(250.9e0) 12:47:10:326 LibMain: Process Name: C:\WINDOWS\system32\schtasks.exeUSERENV(bec.d9c) 12:47:10:464 LibMain: Process Name: C:\WINDOWS\system32\schtasks.exeUSERENV(c08.a54) 12:47:10:648 LibMain: Process Name: C:\WINDOWS\system32\schtasks.exeUSERENV(2d0.e88) 12:47:13:862 LibMain: Process Name: C:\Program Files\Southwest Airlines\Ding\Ding.exeUSERENV(2d0.e88) 12:47:13:877 ImpersonateUser: Failed to impersonate user with 5.USERENV(2d0.e88) 12:47:13:877 GetUserNameAndDomain Failed to impersonate userUSERENV(2d0.e88) 12:47:13:893 ImpersonateUser: Failed to impersonate user with 5.USERENV(2d0.e88) 12:47:13:893 GetUserDNSDomainName: Failed to impersonate userUSERENV(2d0.e88) 12:47:13:908 ImpersonateUser: Failed to impersonate user with 5.USERENV(2d0.e88) 12:47:13:908 GetUserNameAndDomain Failed to impersonate userUSERENV(2d0.e88) 12:47:13:908 ImpersonateUser: Failed to impersonate user with 5.USERENV(2d0.e88) 12:47:13:908 GetUserDNSDomainName: Failed to impersonate userUSERENV(2d0.e88) 12:47:13:923 ImpersonateUser: Failed to impersonate user with 5.USERENV(2d0.e88) 12:47:13:923 GetUserNameAndDomain Failed to impersonate userUSERENV(2d0.e88) 12:47:13:923 ImpersonateUser: Failed to impersonate user with 5....USERENV(80c.81c) 12:47:29:950 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:47:29:950 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:47:29:950 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:47:37:396 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:47:37:396 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:47:37:396 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:47:37:396 GetUserDNSDomainName: Failed to impersonate userUSERENV(754.bd4) 12:47:40:901 LibMain: Process Name: C:\WINDOWS\system32\userinit.exeUSERENV(80c.81c) 12:47:44:841 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:47:44:841 GetUserNameAndDomain Failed to impersonate user...USERENV(518.580) 12:48:02:802 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:02:802 GetUserNameAndDomain Failed to impersonate userUSERENV(518.580) 12:48:02:802 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:02:802 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.210) 12:48:02:817 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.210) 12:48:02:817 GetUserNameAndDomain Failed to impersonate userUSERENV(518.210) 12:48:02:817 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.210) 12:48:02:817 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.580) 12:48:03:003 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:03:003 GetUserNameAndDomain Failed to impersonate userUSERENV(518.580) 12:48:03:003 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:03:003 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.580) 12:48:03:003 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:03:003 GetUserNameAndDomain Failed to impersonate userUSERENV(518.580) 12:48:03:019 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:03:019 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.580) 12:48:03:174 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:03:189 GetUserNameAndDomain Failed to impersonate userUSERENV(518.580) 12:48:03:189 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:03:189 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.580) 12:48:03:189 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:03:189 GetUserNameAndDomain Failed to impersonate userUSERENV(518.580) 12:48:03:189 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:03:189 GetUserDNSDomainName: Failed to impersonate userUSERENV(df4.3e4) 12:48:04:834 LibMain: Process Name: \\?\C:\WINDOWS\system32\WBEM\WMIADAP.EXEUSERENV(80c.81c) 12:48:07:160 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:48:07:160 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:48:07:160 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:48:07:160 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.580) 12:48:09:239 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:09:239 GetUserNameAndDomain Failed to impersonate userUSERENV(518.580) 12:48:09:254 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:09:254 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.580) 12:48:09:254 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:09:254 GetUserNameAndDomain Failed to impersonate userUSERENV(518.580) 12:48:09:254 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:09:254 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.210) 12:48:09:285 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.210) 12:48:09:285 GetUserNameAndDomain Failed to impersonate userUSERENV(518.210) 12:48:09:285 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.210) 12:48:09:285 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.210) 12:48:09:301 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.210) 12:48:09:301 GetUserNameAndDomain Failed to impersonate userUSERENV(518.210) 12:48:09:301 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.210) 12:48:09:301 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.210) 12:48:09:797 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.210) 12:48:09:797 GetUserNameAndDomain Failed to impersonate user...USERENV(518.580) 12:48:13:969 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.ac0) 12:48:23:291 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.ac0) 12:48:23:291 GetUserNameAndDomain Failed to impersonate userUSERENV(518.ac0) 12:48:23:291 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.ac0) 12:48:23:307 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.210) 12:48:23:338 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.210) 12:48:23:338 GetUserNameAndDomain Failed to impersonate userUSERENV(518.210) 12:48:23:338 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.210) 12:48:23:338 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.ac0) 12:48:23:353 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.ac0) 12:48:23:353 GetUserNameAndDomain Failed to impersonate userUSERENV(518.ac0) 12:48:23:353 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.ac0) 12:48:23:353 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.580) 12:48:23:446 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:23:446 GetUserNameAndDomain Failed to impersonate userUSERENV(518.580) 12:48:23:446 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:23:446 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.210) 12:48:23:462 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.210) 12:48:23:462 GetUserNameAndDomain Failed to impersonate userUSERENV(518.210) 12:48:23:462 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.210) 12:48:23:462 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.ac0) 12:48:23:462 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.ac0) 12:48:23:462 GetUserNameAndDomain Failed to impersonate userUSERENV(518.ac0) 12:48:23:462 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.ac0) 12:48:23:462 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.580) 12:48:23:477 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:23:477 GetUserNameAndDomain Failed to impersonate userUSERENV(518.580) 12:48:23:477 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:48:23:477 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:48:29:495 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:48:29:557 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:48:29:557 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:48:29:557 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:49:36:516 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:49:43:946 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:49:43:946 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:49:43:946 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:49:43:946 GetUserDNSDomainName: Failed to impersonate userUSERENV(6e0.91c) 12:49:46:691 LibMain: Process Name: C:\WINDOWS\system32\wbem\wmiprvse.exeUSERENV(80c.81c) 12:49:51:406 ImpersonateUser: Failed to impersonate user with 5....USERENV(80c.81c) 12:50:13:741 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:50:13:741 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:50:21:186 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:50:21:186 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:50:21:186 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:50:21:186 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:50:28:631 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:50:28:631 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:50:28:631 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:50:28:631 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:50:36:076 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:50:36:076 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:50:36:076 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:50:36:076 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:50:43:522 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:50:43:522 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:50:43:522 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:50:43:522 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:50:50:967 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:50:50:967 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:50:50:967 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:50:50:967 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:50:58:412 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:50:58:412 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:50:58:412 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:50:58:412 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:51:05:857 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:51:05:857 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:51:05:857 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:51:05:857 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.580) 12:51:09:362 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:51:09:362 GetUserNameAndDomain Failed to impersonate userUSERENV(518.580) 12:51:09:362 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.580) 12:51:09:362 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.ac0) 12:51:09:362 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.ac0) 12:51:09:362 GetUserNameAndDomain Failed to impersonate userUSERENV(518.ac0) 12:51:09:378 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.ac0) 12:51:09:378 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.210) 12:51:09:393 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.210) 12:51:09:393 GetUserNameAndDomain Failed to impersonate userUSERENV(518.210) 12:51:09:393 ImpersonateUser: Failed to impersonate user with 5.USERENV(518.210) 12:51:09:393 GetUserDNSDomainName: Failed to impersonate userUSERENV(518.580) 12:51:09:393 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:51:50:511 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:51:50:511 GetUserDNSDomainName: Failed to impersonate userUSERENV(dfc.ad4) 12:51:55:521 LibMain: Process Name: C:\Program Files\Java\jre6\bin\jusched.exeUSERENV(dfc.ad4) 12:51:55:521 ImpersonateUser: Failed to impersonate user with 5.USERENV(dfc.ad4) 12:51:55:521 GetUserNameAndDomain Failed to impersonate user...USERENV(80c.81c) 12:52:05:417 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:52:05:417 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:52:05:417 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:52:12:862 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:52:12:862 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:52:12:862 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:52:12:862 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:52:20:323 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:52:20:338 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:52:20:338 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:52:20:338 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:52:27:803 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:52:27:803 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:52:27:803 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:52:27:803 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:52:35:299 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:52:35:299 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:52:35:299 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:52:35:299 GetUserDNSDomainName: Failed to impersonate userUSERENV(fd0.cf4) 12:54:09:955 LibMain: Process Name: C:\WINDOWS\system32\Rundll32.exeUSERENV(80c.81c) 12:54:12:542 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:54:12:542 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:54:12:542 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:54:12:542 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:54:20:022 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:54:20:022 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:54:20:022 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:54:20:022 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:54:27:502 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:54:27:502 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:54:27:502 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:54:27:502 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:54:34:982 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:54:34:982 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:54:34:982 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:54:34:982 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:54:42:463 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:54:42:463 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:54:42:463 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:54:42:463 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:54:49:943 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:54:49:943 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:54:49:943 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:54:49:943 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:54:57:423 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:54:57:423 GetUserNameAndDomain Failed to impersonate user...USERENV(80c.81c) 12:58:41:965 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:58:41:965 GetUserDNSDomainName: Failed to impersonate userUSERENV(d68.950) 12:58:42:214 LibMain: Process Name: C:\Program Files\Microsoft Office\Office12\GrooveMonitor.exeUSERENV(1ec.fb4) 12:58:47:038 ImpersonateUser: Failed to impersonate user with 5.USERENV(1ec.fb4) 12:58:47:038 GetUserNameAndDomain Failed to impersonate userUSERENV(1ec.fb4) 12:58:47:054 GetUserDNSDomainName: Domain name is NT Authority. No DNS domain name available.USERENV(fe8.fec) 12:58:48:505 LibMain: Process Name: C:\WINDOWS\system32\SearchFilterHost.exeUSERENV(ce8.848) 12:58:48:599 LibMain: Process Name: C:\Program Files\Windows Media Player\wmplayer.exeUSERENV(ce8.848) 12:58:48:599 ImpersonateUser: Failed to impersonate user with 5.USERENV(ce8.848) 12:58:48:599 GetUserNameAndDomain Failed to impersonate userUSERENV(ce8.848) 12:58:48:615 ImpersonateUser: Failed to impersonate user with 5.USERENV(ce8.848) 12:58:48:615 GetUserDNSDomainName: Failed to impersonate userUSERENV(ce8.848) 12:58:48:630 ImpersonateUser: Failed to impersonate user with 5.USERENV(ce8.848) 12:58:48:630 GetUserNameAndDomain Failed to impersonate userUSERENV(ce8.848) 12:58:48:630 ImpersonateUser: Failed to impersonate user with 5.USERENV(ce8.848) 12:58:48:630 GetUserDNSDomainName: Failed to impersonate userUSERENV(ce8.848) 12:58:48:646 ImpersonateUser: Failed to impersonate user with 5.USERENV(ce8.848) 12:58:48:646 GetUserNameAndDomain Failed to impersonate userUSERENV(ce8.848) 12:58:48:646 ImpersonateUser: Failed to impersonate user with 5.USERENV(ce8.848) 12:58:48:646 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:58:49:473 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:58:49:473 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:58:49:473 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:58:49:473 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:58:56:966 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:58:56:966 GetUserNameAndDomain Failed to impersonate userUSERENV(80c.81c) 12:58:56:982 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:58:56:982 GetUserDNSDomainName: Failed to impersonate userUSERENV(80c.81c) 12:59:04:459 ImpersonateUser: Failed to impersonate user with 5.USERENV(80c.81c) 12:59:04:459 GetUserNameAndDomain Failed to impersonate user...USERENV(80c.81c) 12:59:41:929 GetUserDNSDomainName: Failed to impersonate userUSERENV(b04.ba4) 12:59:43:132 LibMain: Process Name: C:\Program Files\Windows Defender\MpCmdRun.exeUSERENV(b04.ba4) 12:59:43:194 GetUserDNSDomainName: Domain name is NT Authority. No DNS domain name available.USERENV(b04.ba4) 12:59:43:194 LoadUserProfile: Yes, we can impersonate the user. Running as selfUSERENV(b04.ba4) 12:59:43:194 =========================================================USERENV(b04.ba4) 12:59:43:194 LoadUserProfile: Entering, hToken = <0xa4>, lpProfileInfo = 0x6fde8USERENV(b04.ba4) 12:59:43:194 LoadUserProfile: lpProfileInfo->dwFlags = <0x0>Any ideas???

Another note: We don't use roaming profile. Our network is pretty fast, so I don't think it's a network connectivity problem and again, it's multiple users, but it's not everyone. Also, everyone is on XP sp2 and our Domain Controller/DNS is on a Windows Server 2003 machine. Also, the users aren't having any problems with network connections once they are logged on. DNS seems to be working fine then.

Hello, Please understand that sometimes insufficient information is tough to troubleshoot in your case you havent mentioned the OS on the server and the Service pack applied to it.1)Do not authenticate using the Wiresless network, instead try using Wired network and completely disable the wireless.2) Please check the DNS settings on the clients and see whether they resolve properly.3) Check the SRV record on the Server and try to resolve them from the clientshttp://support.microsoft.com/kb/816587Syed Khairuddin

I did mention the OSs in the second note. The Domain Controller/DNS is a Window Server 2003 maching with service pack 2. The clients are running XP sp2. 1) I've tried that and it doesn't make a difference. The logon time is still slow. May I ask why that would help, though? It's supposed to use the fastest connection available which will most likely be the wired connection.2) The DNS settings are the same for everyone (and not everyone is experiencing this issue). The users that are experiencing this issue have no problem with name resolution once they sign on.3) I went to the support article you recommended and did the nslookup for the SRV record. It also appears to be fine. It shows our dns server (along with the dns servers from other divisions) and has the correct IP. It says:_ldap._tcp.dc.msdcs.domain-name SRV service location:priority =0weight =100port = 389svr hostname = DNS serverDNS Serverinternet address = IPThanks for your reply. Any other ideas?

I asked you to disable the wireless in the first place because the log shows lot of entries which conains wireless information like USERENV(80c.81c) 12:46:54:591 LibMain: Process Name: C:\Program Files\Intel\Wireless\Bin\ifrmewrk.exeUSERENV(348.810) 12:46:54:667 LibMain: Process Name: C:\Program Files\Intel\Wireless\bin\ZCfgSvc.exeso there might be chance of wireless. In order to narrow down the cause of the issue more efficiently, please refer to the following steps to perform a Clean Boot and restart the problematicclient in Safe Mode to see if the issue will re-occur Perform a Clean Boot 1. Click "Start", go to "Run", and type "msconfig" in the open box to start the System Configuration Utility. 2. Click the "Services" tab, check the "Hide All Microsoft Services" box and click Disable All (if it is not gray). 3. Click the "Startup" tab, click "Disable All" and click "OK". 4. restart your computer. When the "System Configuration Utility" window appears, please check the box and click "OK". and try logon process.Thanks Syed Khairuddin

hi there,to add up to syed's recommendation , i would like to know if you are running latest version of userenv.dll and also is this happening to specific clients ? or all of the clients on the subnet is this happening with specific profile or any profile ?Please do login with local profile to eliminate the services which are loading during the startup. If you see that even with local profile the login is slow then we need to concentrate ona) services which are loaded in SCMb) AV ( possible cause ) sainath Windows Driver Development