I have a HP with WinXP Media Edition on it. My computer has always run fine but recently my CPU usage spikes too 100% and the process that is using the CPU is "System". I'll restart my computer and when it reboots CPU is at 1 or 2 but after a short time it will just jump too 100% for no reason at all. I've run Spybot S&D, Ad-Aware, Norton, Stinger, Avast, and AVG and all turn up nothing. I've not downloaded anything of recent and can't figure out this problem. Help would be GREATLY appreciated.