csgo sometimes runs really poorly for me too, but other games run smoothly 100% of the time so maybe its a go issue..
no idea what metro2033 is!
seems like a system overload for me, dont really know tho
having a non legit copy of windows could be a factor because when initially windows 7 was released, it didn't support OpenGL games properly but after a few updates that issue got resolved,
your PC configuration wise looks pretty good but I were you i would get a legit copy of windows and get all those windows updates
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