Senior Member
Steam:
76561197979925166 Steam join date: Dec 24, 2005
Steam Level: 44
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Disable AVG and boot into safe mode, run HijackThis and remove all traces of it (be sure to MAKE DAMN WELL SURE THAT YOU KNOW WHICH THINGS YOU ARE REMOVING) with that. follow up with ComboFix, reboot with AVG enabled and do a full scan.
If it's still there when you re-boot then download Process Explorer (second party microsoft utility that replaces task manager) and shut it down on a service-level and repeat the ComboFix and AVG scan.
If THAT fails, then get a flash-drive bootable linux distro with an antivirus on-board and scan it through that.
If any of that is beyond you or that doesn't work then you'll need to format/reinstall.