R
Rob Sitze
If you are observing the Update errors as posted by several others in this forum, here is a check and workaround that may work for you. This particular error only happened on 1 out of 8 machines I installed today. My findings indicate that the update download was corrupt, but Defender failed to initiate a CRC check, or something . . . and now the corrupt signature files are causing more errors and crashes. Uninstalling Defender and Re-installing does not appear to fix the problem, since the Uninstall fails to delete the corrupted update files, engine and signature, which are store in a separate subfolder on the system.
** The check:
Verify that your latest signatures and engine updates are present:
%ALLUSERSPROFILE%\Application Data\Microsoft\Windows Defender\Definition Updates\{46445988-E360-424D-832B-EAE8AFA33C36}:
02/10/2006 04:09 PM 2,547,984 mpengine.dll (Version 1.1.1185.0)
02/12/2006 07:16 PM 1,545,472 mpasbase.vdm
02/12/2006 07:16 PM 130,304 mpasdlta.vdm
** To force a re-update:
Open Defender, select the down arrow to the right of the "?" help button, and "Exit Windows Defender."
CMD Prompt: "net stop MsMpEng.exe"
Check the directory:
%ALLUSERSPROFILE%\Application Data\Microsoft\Windows Defender\Definition Updates
You will find a "Backup" directory, copy it's entire contents into the specially named subdirectory next to it, mine looks like:
..\{46445988-E360-424D-832B-EAE8AFA33C36}
Restart Defender, and update.
Your mileage may vary . . . this solved it for me nicely.
Rob Sitze
networkdefend dot com
** The check:
Verify that your latest signatures and engine updates are present:
%ALLUSERSPROFILE%\Application Data\Microsoft\Windows Defender\Definition Updates\{46445988-E360-424D-832B-EAE8AFA33C36}:
02/10/2006 04:09 PM 2,547,984 mpengine.dll (Version 1.1.1185.0)
02/12/2006 07:16 PM 1,545,472 mpasbase.vdm
02/12/2006 07:16 PM 130,304 mpasdlta.vdm
** To force a re-update:
Open Defender, select the down arrow to the right of the "?" help button, and "Exit Windows Defender."
CMD Prompt: "net stop MsMpEng.exe"
Check the directory:
%ALLUSERSPROFILE%\Application Data\Microsoft\Windows Defender\Definition Updates
You will find a "Backup" directory, copy it's entire contents into the specially named subdirectory next to it, mine looks like:
..\{46445988-E360-424D-832B-EAE8AFA33C36}
Restart Defender, and update.
Your mileage may vary . . . this solved it for me nicely.
Rob Sitze
networkdefend dot com