Whilst running one of these activate Task Manager by Ctrl Alt Del and note which process is using the CPU resources by the high percentage. Please include that when you post back if there is still a problem.
Also with a browser open, press Crtl Shift Delete and clean your history and cookie cache.
With the latter suggestion, cleaning ALL is the best but it will of course take out any passwords for any sites that you have saved, so you may wish to uncheck that box.
If the problem still exists after these steps then do thishttp://support.micro....com/kb/310353/
Please then post back with details of the process using the CPU and if the problem was solved with the clean boot.
Edited by Macboatmaster, 05 May 2010 - 07:42 AM.