In Windows you can create drives using subst command, for example:
subst w: c:\windows
After this command a new drive W: is included in Explorer, and W:\ shows C:\Windows content.
If I scan some file or directory on W: Avast said: “Some files cannot by analized”, but if the same file or directory is selected but usind C:\Windows path it works. For example:
scan w:\system
said "Some files cannot by analized", procesed files: 1, examined folders: 0
scan c:\windows\system
said "No threat has been detected", procesed files: 31, examined folders: 1
Why ??
Regards.