I have deactivated all mods, and done what you have said, the game runs now, but it is still using 2.0 shaders, and I am unable to turn on HDR, if I do so, the textures wont show up ingame. But anyway, with bloom, it uses 2.0 shaders anyway. The worst thing is, that I know, it is not caused by game, but by my computer. I havent got any problems with any game so far, only with Oblivion. Compatibility mode didnt help, running the game in DirectX9 didnt help. So if you have got any more ideas, please help.