I purchased a laptop two years ago and now it is running slower. i run security 360 on it with scheduled scans daily. I never opened any mail that I didn't know and I never visited any porn sites or chat rooms either. two days ago i opened it as usual, it just froze up and would not respond to the mouse clicks. then i restart it and there is no change. and i've tried system restore many time but with no luck so far.

i am using windows 8 beta 64 bit.

can anyone come up help in this? many thanks in advance.