I installed Pubg, directly from Steam. When I tried to run it, it crashed right after the initial loading screen. I thought that it's odd, so I tried a few things, like: Disabling Anti Virus, Exit from all of the background programs, verified game files through Steam, then reinstalled Pubg and still nothing. Then I fired up Rivals Of Aether, which is a game that I MUST be able to run, it worked just fine on my old pc (smash type of game, very easy to run). That lagged for some reason, the fps counter kept showing 45-50 fps both in main menu and in game. After that I tried playing Dirty Bomb (earlier today I ran it at Max Settings at 180 Fps, which is capped by the game engine). It showed around 160 fps, same settings and same scenario (I played the tutorial), which is odd, where did those 20 fps go? Then after all sorts of ideas, like changing ram slots, installed older gpu drivers, installed new drivers for other stuff, and finally resetting Cmos and still nothing. Then I decided to do a clean windows reinstall. I took a usb, completely empy, downloaded the windows media creation tool, and started the process. It downloaded windows, and when the creation began, soon it reported and error with no actual info, just said there's a problem. I tried formatting the usb, but it said it failed at doing that. When I tried it again it worked and I started the process again. After some waiting it reported the same problem again (Error code is 0x80042405 - 0xA001A). So now I can't even reinstall windows. Any help would really be appreciated...
Edit: I forgot to mention I ran Windows in Safe mode, and then tried playing Rivals of Aether again. That time it had fluid 60 fps WHILE in game. In menus it was still laggy. So it makes me think it's due to Windows?