Just reinstalled latest Avast after uninstalling and rebooting. Ran sigverif. No errors but under Advanced when you look at the sigverif.txt log you will see:
Unscanned Files:
[c:\windows\systemroot\system32\drivers]
aswrvrt.sys The directory name is invalid.
aswvmm.sys The directory name is invalid.
Looking at the registry entries
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\aswRvrt
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\aswVmm
I see the following for ImagePath:
\SystemRoot\system32\drivers\aswrvrt.sys
\SystemRoot\system32\drivers\aswVmm.sys
There is no such folder as \SystemRoot! It should be
%SystemRoot%
This same error is present in most other asw… entries