Slight problem. Dad called me to come in and check out his box, having weird error. Hard drive seemed like it was continuously running, all app's were extremely slow, net was slow, (roadrunner, shouldn't be slow), everything was sluggish. Went from fast computer, tons of ram, no problems to sluggish overnight. OK, so he took out that hd, put in another drive he had, installed windows, apps, files. Problem solved, computer is now working a lot faster, no hangups. Leaves for the weekend, now it's sluggish again. Hd problem? Virus? Kept timing out on virus updates for norton, ran virus scan, found none. Second computer on home network has a continously running hd now, won't open the cd rom door, won't recognize the burner.... What do you guys thinK?