my toshiba laptop had been running slow ....thought it was because the hard drive was just loaded with media and was filled with infections ....put a new hard drive in but problem is still there when ever i run for example msn games or you tube video for any extended period the the unit gets hot the fan and motor seem to run extra hardand everything slows down on screen.....i keep the comp up off surfaces to let air flow beneath...but still the unit often overheats and shuts down.......any advice would be appreciated.....thanks