Hello Andre, thanks a lot for this tutorial, it is very helpful. My problem with High CPU usage by Interrupts begins 5 secs AFTER I run a game. However, the problem doesn't appears allways I run a game (I can't determinate why sometimes the problem shows up and other times it doesn't) When the high CPU Usage begins, it doesn't stop when I (slowly and patiently) shut down the game. The problem remains for about 5 minutes, and then the computers is back to normal. Here are the pics when i have just shut down the game and the problem remains: I Have: -AMD Phenom II x6 1090 T Processor -ATI Raedon HD 5770 Graphic Card -Asus M4A89GTD PRO Motherboard I hope you can help me solve this problem, I am dealing with this since I purchase this computer. Any ideas about what SCSIPort.sys, dxgkrnl.sys, and ataport.sys? Thankyou Andre PD: Sorry for my bad english