ClamAV False Positives
I do not know whether it is a problem with ClamAV’s definitions database, or an issue with their current engine, but ClamAV currently identifies numerous false positives. Some of these false positives include detecting ‘trojans’ in clean Windows driver files, which it will quarantine, rendering the host unbootable.
As such, I strongly suggest against using the Virus Scan and Quarantine task until this problem is resolved on ClamAV’s side. This is not a FOG problem, and I do not know of anything that can be done to work around the issue.