I'm not sure how to explain it, but the fullscreen can be very buggy, and it messes with my pc 

Another weird thing is that when i push the Windows key to get out, i always see this odd patch of white on the top left of my screen. I'm not sure if it's just me, i use Windows 10 

you can fix the white border at the top by just going to your settings menu and click fullscreen fetish to on even if its already on it will fix the issue.