Hijacked...

[usil]

According to this, a system restore will not work if the anti-virus deletes or quarantines a file during restoration:

During a restoration, an active antivirus program scans for infected files. If the antivirus program detects any infected files, the antivirus program tries to modify, move, or delete the infected files. If the antivirus program successfully cleans the infected files, System Restore restores the cleaned files. However, if the antivirus software cannot clean a file, the antivirus software deletes or quarantines the file. As a result, the restoration does not work because these actions to the file cause an inconsistent restoration state. As a result, System Restore reverts to the state immediately before the restoration.

As they have an updated ESET installed, which I know will kill the virus (because it cleaned the virus from a second computer), I'm not worried about a reoccurrance.

[Broni]

I really don't need to look at M$ dangerous pep talk.
Dangerous, because M$ tries to assure you, that there are some bullet-proof AV programs out there, which is simply not true.

All I need to do is to look at tens of malware cases, I handle every day, to know better.
I'm not going to drag this discussion, since you have your different point of view.
You're very entitled to have one.

[usil]

I believe the cases you refer to are when the anti-virus cannot delete the infected files. In that case, the virus will get restored. But in the case of an updated AV which has the virus signatures, it should delete the virus on restoration.