Lately (since end of August), SCEP (MSSE, too) does not seem to be able to update its definitions on Server 2008 SP2 (NT 6.0). Running the same on Windows 7 is fine, however. Even a complete reset or new installation does this. 0x80070643 Did MS b0rk it on Server 2008 SP2? (Unfortunately, I also can't find any other free AV that will run in Server 2008 SP2.)
It worked here extracted mpas-fe.exe with 7-zip replaced the new mpengine.dll ran following cmd as admin Code: MpSigStub.exe /stub 1.1.16900.5 /payload 0.0.0.0 you may need to clear this folder first C:\ProgramData\Microsoft\Windows Defender\Definition Updates\Backup\ the missing kernel32.dll's TryAcquireSRWLockExclusive broke a lot of programs on NT 6.0
Yes, I got it to work. For some reason, my old extracted mpas-fe.exe directory missed the dynamics (maybe because it was a fresh cycle). I just got and extracted mpas-d.exe, too, for the dynamics. The complete set (5 files, including the compatible mpengine.dll) copied to "C:\ProgramData\Microsoft\Microsoft Antimalware\Definition Updates\Updates\" triggers an immediate update (the files will disappear). If the set is missing files, nothing will update, but the files disappear, too. Code: mpasbase.vdm mpasdlta.vdm mpavbase.vdm mpavdlta.vdm mpengine.dll