I've run into too many laptops that have failed in warranty with similar stories to not tell you anything else.
Get the maker involved and DO NOT tell them about the Avg etc. Just tell them what the machine is doing, not doing and follow the instructions to get it fixed.
My norton antivirus expired, so a friend suggested AVG 8.5 free edition. After installing it, my gateway laptop kept freezing. I uninstalled it and now my windows vista won't even boot up. It will only go into safe mode. I tried system restore and it froze and when i restarted the computer, it said there are now no restore points. This is a newer laptop and i've had no problems before this....please help.