Check to see where it is detecting the virus. There are some locations that AVG does not scan typically. This may be the case. I have, in the past, had a virus in the system restore file and AVG does not scan these files by default. The 'fix' was to shut off system restore, restart and then re-enable system restore.
I used AVG Free Edtion and it took it out. It was in two files. Wintrim.2.G and Wintrim.2.J was on my Computer.
Downloads popup generator malware and propagates the infection to other dummy system files. This contains the wintrim downloader Trojan
Trojan Downloader is one of the most dangerous threats. Once this threat is infected with your computer, it is necessary to remove Trojan Downloader at once. There are some tips on how to remove and prevent Trojan Downloader from your PC below.
hacking
http://www.ca.com/us/securityadvisor/virusinfo/virus.aspx?ID=62504
W32/AutoIt Trojan and its variants VirusW32/Delf Downloader Trojan and its variants VirusW32/OnLineGames Password Stealer Trojan and its variants
Dropper.small is a Trojan downloader
W32/AutoIt Trojan and its variants VirusW32/Delf Downloader Trojan and its variants VirusW32/OnLineGames Password Stealer Trojan and its variants VirusW32/Agent Dropper Trojan and its variants W32/Agent.ENU.Dropper is a Trojan. The Trojan will infect Windows systems. VirusW32/Peacomm Trojan and its variants
purity scan ac - http://www.symantec.com/security_response/writeup.jsp?docid=2003-090516-2325-99&tabid=3
format
with avast! antivirus 4.8
virus virus