while playing a game my display went white at once. After trying to alt+tab out of the game it turned black and did not change after that.
I turned off my PC and turned it on again. First, it turned on up to a blue screen saying: "Your PC ran into a problem and needs [...] What Failed: atikmpeg.sys". It restarted and came to the same screen about 3 or 4 times after which i just turned off the PC once again.
After turning it on again it turned on black on the Startup screen and green on the Windows Loading Screen. The Windows desktop itself was black but worked (i could shut it down via command prompt with shutdown -s).
After starting it again it turned on completely black, the display turned on and off as it should while startup (Turned on while on Startup screen, faded off after that and went on again on the windows loading screen and so on).
This happens now every time i start it. I reinstalled the Windows, turned off the power and got rid of all the remaining current also i reseted BIOS to default.
Now, on this newly installed pc I have no atikmpeg.sys in System32 so it can not cause any problems anymore. The PC worked also after 1st instalation without that file too.
Is the computer working normally right now? The issue may be video card related. Please make sure you have all the latest drivers installed. If the issue persists, uninstall the video card and install the previous stable version of the drivers. You have done pretty good job trying to solve the issue. If changing the drivers does not change the situation, there may be a hardware problem. Is the card under warranty?