"[SID:23674] System Infected: Virut Request 2 detected" keeps popping up every few minutes. I have windows 7 and use firefox as main browser. Symantec was updated 3 days ago automatically. I can see a large amount of events in Client management security log with the full message: "[SID: 23674] System Infected: Virut Request 2 attack blocked. Traffic has been blocked for this application: \DEVICE\HARDDISKVOLUME2\WINDOWS\SYSWOW64\SVCHOST.EXE."
Is this a sign of infection or is my virus protection actively fighting an intruion? Is there anything I can do?