I have Windows Ultimate 64 Bit,about a month or so ago,windows stopped updating is kept giving me "80070424" with update error in front.I've been looking for solutions all the time everyday,and I can't find one that works.I've tried :"REGSVR32 %SYSTEMROOT%\SYSTEM32\WUAUENG.DLL" inside the command prompt and I get this:http://i22.photobucket.com/albums/b321/dantemaster2/Untitled-2.jpg^ look at link to see results.I also have checked to see that the BITS thing isn't set to automatic I have it set to manual .I've tried a lot of different solutions I've found and nothing has been working.So can you please help..Also the Bits repair tool tells me this:http://i22.photobucket.com/albums/b321/dantemaster2/Untitled2-1.jpg^ look at link to see results.

Bryan Are you using an elevated command prompt for that command? Did you stop the Windows Update service before using that command? Go to this thread. We have had good luck with this process solving the error message 80070424. Look at the second message in the thread and follow the instructions very carefully. windows update error 8E5E0442 - TechNet Forums: http://forums.microsoft.com/TechNet/ShowPost.aspx?PostID=3448011&SiteID=17 If this post helps to resolve your issue, click the Mark as Answer button at the top of this message.By marking a post as Answered, you help others find the answer faster. Ronnie Vernon Microsoft MVP Windows Desktop Experience

Hi, I tried everything in the above post, and I still received error code 80070424. I have Vista Ultimate 64 Bit, service pack 1. Updates used to work, but the last time they worked was in June 2008. I can't tell you the exact dates, because all the changes recommended in the above post caused my update history to be wiped out. Any ideas, John

I have a Vista Home Basic 64bit. I am encountering the same problem with the Winows Update. I tried your suggestion, after all the others seen in the different fora, but running the windows installer 4.5 for Vista SP1 64 bit (Windows6.0-KB942288-v2-x64.msu) was not possible. 'De Updategeldt nietvoor uw systeem' (update not suited for your system) Is there still something else I can do?

I started having the same problem with Vista Ultimate 64 after Sept 16th 2008. I have one question about the above advice. It seems to me the correction is for a 32 bit system, not a 64, is that correct? I am hesitate to start something that may crash the whole system. My previous system was Win2000, and I have had nothing but problems after upgrading to Vista.

I have read quite a few forums on this problem and it does seem to me that the solutions given only work on the 32 bit and not the 64 bit. I myself am having the same problem on the 64 bit and none of the solutions listed above or on any other forum I have found are mentioned to work on the 64 bit system. Please if anyone figures out what to do in order to correct this error let us know.

I also have this problem....not able to update Vista X64 after installing SP1 in 2008 11. Also, screen savers and sleep options dont work anymore. Very frustrating to say the least.Is this a Vista 64 problem that people are trying to fix using 32 fixes? I have also tried everything, including Microsoft support help and they just archived my problem and didnt offer anything else after suggesting a few fixes that obviously didnt work.

Same problem here on vista x64. It stopped working about a month ago, jun 2009 anyone found a fix for poor vista64 users?

I'm so glad I found your post. Been working on error 80070424 for a while. Thanks a lot!!!!!

Click Start, select run, type: regsvr32 wuaueng.dll Use the Enter Key or Click OK and after that reboot it.

STEP 1: Check to see if the Wuauserv Key exists on the system in following Registry Key path: DISCLAIMER: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems that result from incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk. HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\wuauserv Click on Start, type “Regedit” in Start Search box. Go to following path and look for Wuauserv Registry Key. HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\wuauserv If this key is missing, perform the following steps to import the Wuauserv Registry Key from working system: To take the backup of the registry Key: 1. On the File menu, click Export. 2. In the Save in box, select a location where you want to save the Registration Entries (.reg) file, type a file name in the File name box, and then click Save. 1. Export the Wuauserv Registry Key from a working Windows Vista system. 2. Right click on the Wuauserv Registry Key that is saved it in on the system that’s exhibiting the issue. 3. Restart the system. 4.copy the below given text in a notepad and save it with . reg extension. Double click and run the registry file. Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv] "Type"=dword:00000020 "Start"=dword:00000002 "ErrorControl"=dword:00000001 "ImagePath"=hex(2):25,00,73,00,79,00,73,00,74,00,65,00,6d,00,72,00,6f,00,6f,00,\ 74,00,25,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,73,\ 00,76,00,63,00,68,00,6f,00,73,00,74,00,2e,00,65,00,78,00,65,00,20,00,2d,00,\ 6b,00,20,00,6e,00,65,00,74,00,73,00,76,00,63,00,73,00,00,00 "DisplayName"="Automatic Updates" "ObjectName"="LocalSystem" "Description"="Enables the download and installation of Windows updates. If this service is disabled, this computer will not be able to use the Automatic Updates feature or the Windows Update Web site." [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv\Parameters] "ServiceDll"=hex(2):43,00,3a,00,5c,00,57,00,49,00,4e,00,44,00,4f,00,57,00,53,\ 00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,77,00,75,00,\ 61,00,75,00,73,00,65,00,72,00,76,00,2e,00,64,00,6c,00,6c,00,00,00 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv\Security] "Security"=hex:01,00,14,80,78,00,00,00,84,00,00,00,14,00,00,00,30,00,00,00,02,\ 00,1c,00,01,00,00,00,02,80,14,00,ff,00,0f,00,01,01,00,00,00,00,00,01,00,00,\ 00,00,02,00,48,00,03,00,00,00,00,00,14,00,9d,00,02,00,01,01,00,00,00,00,00,\ 05,0b,00,00,00,00,00,18,00,ff,01,0f,00,01,02,00,00,00,00,00,05,20,00,00,00,\ 20,02,00,00,00,00,14,00,ff,01,0f,00,01,01,00,00,00,00,00,05,12,00,00,00,01,\ 01,00,00,00,00,00,05,12,00,00,00,01,01,00,00,00,00,00,05,12,00,00,00 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv\Enum] "0"="Root\\LEGACY_WUAUSERV\\0000" "Count"=dword:00000001 "NextInstance"=dword:00000001