system
6
With all likelyhood this is a false positive and I would say that formatting your drives is a gross overreaction, if nothing else since this patch was launched by Sony on wednesday and they have still not pulled it from their servers despite numerous posts about it on their forums. (They seem confident that there is no problem in their patch/file)
The problem is present in both Avast 2014 as well as the latest prior version (as in before 2014), including latest virus definitions (131019-1).
Avast first reacts to temporary copies and parts of the file upon installation of the patch via the game launcher/updater, as shown in of the chest screenshot attached.
(As a bonus issue, the “restore and add to exclusions” in the chest does not actually add any exclusion)
Edit: Virustotal analysis: https://www.virustotal.com/en/file/113662e24dd95de28536dbfa56396afd76f2a99e34d2186e18ea25922d1e0cf8/analysis/