Behavior you are descripting was certainly not caused by AVG.
Most likely you have downloaded fake security suite.
Please only download AVG from Cnet(cnet.com) or AVG main site(avg.com).
If your computer is still infected I would recommend trying to scan it with AVG Rescue CD:
If the issue persists and you would like us to help you remove the infection, please provide us with both GMER results:
Since it is not possible to attach any files here on CNET please upload the files to some online storage service.
I downloaded AVG 9.0 and it completely fried my computer.Went to AVG web site for download and later found out about all the warnings about this software. The next morning the AVG 9.0 had hidden it's files deep into my computer. The removel tool that they said will remove it, Doesn't work if anything the download had more infections that were added to the ones that AVG 9.0 put on my computer from the beginning . 25+ Viruses: Trojan.Antivirus.avg, Virus.Win32.Faker.antivirus.avg, and more that had the name AVG Antivirus listed in the name of the virus and that were listed in the warning that was sent out week ago warning people.. AVG should be replacing my computer. I wont be expecting that in a million years...