My audio and video stutter randomly when played. My laptop's become considerably slower and 2 or 3 running programs take up most of the memory ( upto 90% in most cases). I've run all scans necessary for spyware detection, including HijackThis, with help from the Malware forum. I've removed some unnecessary items from startup, but there's little improvement. There is no more malware, but the audio and video still stutter! Please help.