When disinfecting a Windows XP, Windows Vista, or Windows Me computer, Sophos Anti-Virus for Windows might report some infected files in System Restore. If this happens, purge System Restore. You should do this, regardless of what action Sophos Anti-Virus reports it has taken with those files.
The reason for this is
- You should not restore from a version of Windows that was infected.
- If files in System Restore were changed in any way, they will not restore correctly.
Two Microsoft Knowledge Base Articles describe why you should purge System Restore in this situation:
What to do
Purge System Restore on