Which version of Windows do you have?
Would you attach a picture of the task manager?
Im using at the moment Windows 7 Ultimate 64bit.
I made a screen when I just had a game open without playing it yet else it went to 80/90, look printscreen below.
Thanks for the picture.
I see Special Force 2 and other processes combined running at 71%. I do not see a problem on this computer.
I would start by updating to the latest video drivers, or windows updates.