I have a pc here that I can not uninstall AVG 2011 free edition. I scanned the PC with Malwarebytes (found 2 Trojans Fake AV) and found nothing with SuperAntiSpyware. When I would try to download other programs(HighJackThis etc.) the AVG 2011 would say that the file was infected with a virus and was deleted. This person even paid for AVG 2013 and the disk that came in the mail was supposedly infected with a virus. What type of bug on a Vista desktop would make this happen. I tried uninstalling AVG 2011 and it does nothing. I even downloaded the uninstall AVG 2011 program and it said it was infected with a virus and was deleted. Can some of you experts lead me where to go from here? I don't know what else to try. PC is a 2008 HP Pavilion a9614f running Vista 32 bit.