Hello there, first I would like to tank you for this topic and for your effor to try to help others. I have asus k53sc, intel i3, 4gb ram, Geforce mx 520. WIn 7 proffesional I have OS on ssd disc solo and instead of my DvD I have hard disk. I have High CPU usage ( 1 of the 4 threads ) is running on 100% most of the time. It starts after I play for some time a game. (WoT, WoW, LoL, AC, anything ) Sometimes it start after 2 minutes sometimes immediately. I've tried program procexp because it can shut a proces down... it didint work. Then I tried that it might be doing screwes in motherboard.... so I carefully disambled notebook and turned it on without screwes and it didint work either. I have tried to re-aply the cooling past on CPU and clean the notebook. I have tried formating the system I have installed every driver u can think of, BIOS chipset, graphic card, sound card everything. I tried to disalble special soundeffects coz I have found that it helped someone. Didn't work. Then I have found your thread and found out that it is probably causing ACPI.sys . Read whole thread and havent found anything that would help me. Here is my DPC file with the txt exported one. http://uloz.to/xWrFZXYt/dpc-interrupts-4-rar I really appriciate what you are doing here and I am looking forward to your advice. Spotak