8.9 gets avast error / zip file issues

1/17/2014 10:05:45 AM G:\Archive\WindowsManagement\wsusoffline89\wsusoffline\client\UpdateInstaller.exe [L] Win32:Evo-gen [Susp] (0)
File was successfully moved to chest...
I can see others had problems with other virus protection systems &
it looks like some fixes have been made (that's as much as my
limited German can get, sorry). Avast rips something out
of the distro (above) & also most of the zip programs don't
like the .89 zip file at all, 7-zip for instance claims it's
unreadable.
I think I'll stay away from this particular update until
I have a better understanding of what's going on.
My clientele is a school & we have to be squeaky clean.