Hi, After server has been down due to a power failure, I can't restart Microsoft Exchange POP3 service anymore on Exchange 2003. When try to restart it I got this msg: Could not start Microsoft Exchange POP3 service on Local Computer Error 193:0xc1 In event log, I have this: Event Type: Error Event Source: Service Control Manager Event Category: None Event ID: 7023 Date: 10/24/2010 Time: 2:45:34 AM User: N/A Computer: EXCHANGESERVER Description: The Microsoft Exchange POP3 service terminated with the following error: Microsoft Exchange POP3 is not a valid Win32 application. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

On Sun, 31 Oct 2010 19:13:46 +0000, SAMATA wrote: >Hi, After server has been down due to a power failure, I can't restart Microsoft Exchange POP3 service anymore on Exchange 2003. When try to restart it I got this msg: Could not start Microsoft Exchange POP3 service on Local Computer Error 193:0xc1 In event log, I have this: Event Type: Error Event Source: Service Control Manager Event Category: None Event ID: 7023 Date: 10/24/2010 Time: 2:45:34 AM User: N/A Computer: EXCHANGESERVER Description: The Microsoft Exchange POP3 service terminated with the following error: Microsoft Exchange POP3 is not a valid Win32 application. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Does the property page for the service use "C:\WINDOWS\system32\inetsrv\inetinfo.exe" as the "Path to executable"? --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

Yes it does

On Sun, 31 Oct 2010 23:15:03 +0000, SAMATA wrote: >Yes it does Hard to say what the problem might be, then. Try running "sfc /scannow" on the machine. Have the server CD handy if some of the files aren't in the DLL cache. If things were running before and they aren't runnng now it's likely to be a file system problem. Check the registry and verify that the POP3 service is using the right files, and that the files are present: IISDllPath = c:\program files\exchsrve\bin\pop3svc.dll DiagnosticsMessageFile = pop3evt.dll There are other DLLs in the Parameters key. --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

Registry seems ok. Is it possible to just reinstall pop3 in Exchange 2003?

On Mon, 1 Nov 2010 02:21:40 +0000, SAMATA wrote: >Registry seems ok. > >Is it possible to just reinstall pop3 in Exchange 2003? Why not just copy the files from the installation media, or restore them from a recent backup? --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

Ya I can try, which file exactly should I restore?

On Mon, 1 Nov 2010 02:36:35 +0000, SAMATA wrote: >Ya I can try, which file exactly should I restore? The ones in the registry for the POP3 service (but not the inetinfo.exe). --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

Hi Rich, I compare the \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\POP3Svc in registry with a reg backup and both have the same parameters. Any other idea?

On Tue, 2 Nov 2010 03:49:46 +0000, SAMATA wrote: >I compare the \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\POP3Svc in registry with a reg backup and both have the same parameters. That's not surprising. >Any other idea? Other than what? Have you restored the file names you found in the POP3Svc registry keys? That's what I suggested. --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

Sorry Rich for the delay. So you are not surprised that both POP3Svc in regedit have the same parameters? I mean if they are the same even if I restore, it will just put the same parameters back no? Anyway I did and it still the same. In that case is it possible to reinstall Exchange 2003? Maybe there are corruptions in some files. Thank you.

If you see the registry it will show a File , an executable .. as also some dll's , can you replace those files from exchange media . Please confirm the version as your media maybe of Exchange 2003 with relevant service packs. Also increase diagnoistics logging for pop3 service and keep reinstallation last option .

On Fri, 5 Nov 2010 07:28:35 +0000, SAMATA wrote: >So you are not surprised that both POP3Svc in regedit have the same parameters? I mean if they are the same even if I restore, it will just put the same parameters back no? > >Anyway I did and it still the same. In that case is it possible to reinstall Exchange 2003? Maybe there are corruptions in some files. The registry isn't the problem. I referred you there so you could identify the files that are used to run the service. Restore the files referenced in the registry keys for that service (with the exception of inetinfo.exe). --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

Finally I fixe my prob by reinstalling Exchange 2003. Thank for your help.