I have searched through this forum without much luck on this subject. I have a Intel quad core Q6600 CPU but only 2 of the cores are showing up in the Task Manager but if I check the device manager all 4 are showing there. Does anyone know if Windows 7 is using all 4 cores and just not showing 2 of them or just using 2 of them? Also only 2 show up if I check MSconfig. All 4 showed up Task Manager under Vista.