It isn't a matter of not being able to scan.
It is a matter of choosing in favor of data preservation.
Suppose you have a zip file containing a backup of another machine. One
item in that backup is a spyware-related executable.
It appears that what IS true, is that Windows Defender is incapable of
re-writing the archive to contain just the uninfected files. So--given the
choice between deleting the entire archive or leaving the archive out there
and alerting the user with the error dialog--it leaves the archive out
there. The error dialog will improve, we hope.
Does that make sense? We'd all like it to be able to open the archive, and
re-write it with just the safe content, but that could take a good long
time, and a lot of code.
--
Beyondtool said:
Are we talking zip archives here? So can't defender scan zip files? Or is
this only other types of files like rar etc.