I tried Windows 7 repair disk, startup repair didnt help (i runed it several times), system offered repair too, but no result, i even tried to run Windows 7 install disk, but then it run till blue window appiered (the one with Windows 7 theme) and nothing more, i could only move my mouse on it, it was empty. At first it started. looked alright, exept it was slower than usual, i restarted and the problem appiered. What can i do to fix this?