Yesterday my PC got infected with Trojan.Zeroaccess and Trojan.Gen.2. Symantec Antivirus auotprotect reported a swarm of Trojan.Zeroaccess and Trojan.Gen.2 infections. After multiple scans SAV no longer reports that the viruses are on my computer. However real time protection is disabled and I cannot restart it. Similarly Windows Firewall is disabled and cannot be enabled.
Malwarebytes reports that Trojan.Agent is infecting my computer as well. I don't know if this is related to my Zeroaccess and Gen.2 infection. Any help would be appreciated.
My PC is running Windows XP SP3 and I have a flash drive.