Do a factory restore. there should be a button you push at startup. If you are getting an "operating system not found" error I guarantee that's all geek squad is going to do. They also can't gave checked for a virus in that state and wouldn't bother, so they are just guessing. are you even sure you had a virus? it very possible it got corrupted or had a hardware problem instead. the number one rule to remember is geek squad has no idea what they are talking about. number 2 is they will rape you for pushing 3 buttons
Thanks so much for your information and help. I'll try that. You are right about the Geek Squad. I felt like they were asking way too much to get it working again.