Hello Andre. Nice tutorial. It helped me greatly to find the source of high CPU usage. But even though I know what is causing the problem, I don't know how to fix the problem: halmacpi.dll This halmacpi.dll is using 50% or more of my cpu for 2-3 seconds in every 25-30 seconds interval. This causes a noticeable lag or unresponsiveness in my computer whenever I am doing anything that is CPU intensive. halmacpi.dll is also a part of a window system process so I can't exactly remove or shut it off either. And searching around the internet didn't help me much for finding a solution. I've attached the screenshots of table summary. A link to the downloadable latency.etl is here: http://www.megaupload.com/?d=PNTZL0GU I appreciate any help or advice you could give me. Thanks