Without knowing that my HDD was almost full, i dowbloaded a big File which resulted in some window-popup error. I cant rembeber what it Said but after that i got this blue screen telling me 0xc0000225. On this screen there was a recovery option but clicking that did just get me back to the blue error screen over and over.
I am at the moment doing a system extensive test. I was afraid that something happened to my harddrive but the test seems to pass.