Starting yesterday upon booting up my pc into Windows 7, All four cores are running at 100%. First I thought it was a website, closed IE, no change. Closed outlook, no change. Closed everything. No change. If I open task manager, sudenly cores goes back to normal use. I see no strange services or task running. I downloaded process explorer and it too shows nothing out of the ordinary. the minute I close task manager or process explorer, all four cores goes back to 100% use. I even ran a full scan from Malware Bytes and MSE. Both came up fine. At this point I have no idea how to track this down. Any ideas?