If you want to know if it is the case with you, then go on Windows 7 Desktop times when the right mouse button on the gadgets and activates the CPU speedometer. When not doing nothing falls below 20%, you have the same problem.
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Addendum: I was able to fix the problem when notebooks suffer from CPU load or can no longer be off properly. The solution: You have to unscrew the Caddy and disable a specific contact of the connector by severed this or the contact of the back draws. Now everything runs fine. This is the 3rd pin from the left (Manufacturing diagnostic).
Nevertheless, only 1 star because other caddies have this problem a small switch and a corresponding instruction. In this, a switch and a manual is missing.