I thought I fixed this problem. >_< I have Windows 7 64-bit Home Premium and a few months ago after a update each core of my 4 core cpu would run at 25% at idle. I looked up the problem and after a long time of sifting through posts I found a patch that supposedly fixed the problem. I intstalled it and rebooted and it went back to normal. Yesterday my comp downloaded another update and when I rebooted the issue came up again. The only way I can get it to run at 0% like normal is if I stop Windows Update service in Task Manager. I don't want to leave it like that though. Does anybody know how to permanently fix this?