vIRUS THREAT DETECTED AVG

I hate to bug you guys but what the heck?

"Infection";"Trojan horse BackDoor.Generic12.AZGS";"C:\System Volume Information\_restore{1C83B6E1-A33F-4078-A74D-614B8AE48A7A}\RP346\A0091459.dll";"";"3/30/2010, 7:45:23 PM"

"Infection";"Trojan horse BackDoor.Generic12.AZGS";"C:\Program Files\Subagames\CrossFire\XTrap\XTrapVa.dll";"";"3/30/2010, 1:00:12 PM"

i got these 2 messages from my AVG today. and normally there are no problems. Please help me to identify this problem so i can fix it. i do not want to remove any essential programs that my interfer with CF but I also get tons of threats from noob players threatening to hack my account.

Just wanted you guys to know this existed and hope that it can be remedied