Hello Andre I read the first 15 pages of the thread, and couldn't find anything close to what I am experiencing - if a solution is in the second half I apologize for wasting your time. It seems to me my numbers are very high, you said to watch out for usec values over 256... almost all of mine are over 100,000 =\ Here's screenshots of both DPC and Interrupt tables http://img855.imageshack.us/img855/8336/dpca.jpg http://img10.imageshack.us/img10/9877/interuupt.jpg It seems multiple files are causing issues, even my lower ones seem to have higher values than I've seen other people post their highest ones have (if it's relative numbers that matter, and not absolute ones, I guess this is irrelevant though) My etl file is 664mb but if you want me to upload it i can. The specific issue i'm having is every 15 or so minutes, my CPU usage hits 100% for 5 - 10 minutes. If it helps this is after a dell tech came over and replaced my motherboard with a new one. All my drivers (webcam, chipset, video, network adapters, bios, card reader,etc.) are all up to date from the dell website. My machine is a Dell Studio XPS 16 laptop, running Vista SP1 64 bit This has been driving me nuts, anything you can help with i'd greatly appreciate.