Recently most games on my computer have just stopped working, or are acting very strange. For example, when i go into halo 1 sometimes i can't see any models, and some maps dont work and it crashes. Also if i try to play Call of Duty 4 when it loads it says "DIRECT X FAILURE" I've tried reinstalling and getting the latest versions of DirectX but nothing is working.. I've also tried reinstalling + updating my graphics drivers. I have a HIS ATI Radeon 4850 Edit: Also, i deleted Directx 9 and in Dxdiag it says Direct X version unknown, now when i try to install it again it says "An internal error has occurred please refer to DXError.log and DirectX.log in your windows folder to determine problem"