Question Black screen after restart

Apr 30, 2020
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Hi if anyone could help would greatly appreciate it, I was optimizing my call of duty game on my pc watching a video how to optimize it, there was zipped package for the FPS boost which had registry files in there to "optimize" my game after using the registry files the next step was to restart pc I did that then my screen just went black tried plugging my VGA to motherboard or putting a different graphics card in nothing worked also took out battery from the motherboard for a couple of mins also didn't help is this some kind of new virus?