Problem XFX HD6950 1GB, 99% activity while running no programs

Hey,

my XFX HD6950 1GB is running at 95%-99% when not performing any tasks. Here are some solutions i tried which did not work:

I restarted my pc but that did not solve the problem.
I tried to reinstall my driver but that also did not fix the problem.

the driver i am running for my GPU is the latest catalyst control centre. The problem started a few hours ago but my pc did not crash (yet).

I hope one of you knows the solution for this problem, I would be very grateful :)

PS. Sorry for my English grammar, it is not my main language

catalyst control center has a feature that allows to look at the activity of fans, GPU, temperature and so on.
but thanks for the tip. I will now shut down my pc completely and hope the problem is fixed by that.

It did not fix the problem. I shut down my pc, unplugged the the ehm... plug xD pressed the startup button twice 2 make sure the power supply was totally empty. then re-plugged the plug and restarted my pc.
maybe you have any other suggestions?

I tried older and newer versions, but I know partially what the problem I now. Every time I connect to the internet my activity goes to 99%. When I disable my connection the activity drops to 0%.