I have two Cyberpower PCs running Windows XP Home. The newest one's hard drive is constantly active (the yellow "active" light on the drive blinks every 1 - 2 seconds). I have installed and ran Spybot Search-and-Destroy to eliminate tracking threats. Still the hard drive pulses away. The older Cyberpower acts normally. The hard drive shows activity when I would expect it. Is there a utility that can tell me what application is generating all this hard drive activity? Thanks.