I would like to reformat my hard drive to the original factory settings, but I have had a terrible time of it. My system recovery disk tells me that I am using it in the wrong machine. My AVG virus protection can no longer check the whole system because it gets to what i think may be 3/4 of the check and then the machine crashes. It crashes using most programs, I can't figure out how to fix it. None of the registry fixers have worked either. Do I have to buy a new computer?