So just to close this topic with a last look at it: My RAM was overloading. need moar Ram. my 8 Gig are not enough. 7.5 used before starting Skyrim. And 500 Mb are not enough for Skyrim. Maybe that's the reason for everything. Hadn't restarted my PC in about 5 days. So if you have the same issue start restarting..helped me