I'm having similar sounding problems. Only the thing is, I haven't seen any solid evidence that I have a virus on my computer. That is to say that I never personally came across any virus on my computer. It seems to complain about errors and I am unable to run Disk Defragmentation, also, any online games run like an anvil up a muddy hill. I've used Scan Disk all the way through many times... bah! Any advice?