So the other day I tried using my computer , which was working fine the last time I used it. When I turned it on, it did get past the Windows logo but beyond that, it just got stuck at a black screen and mouse pointer (it still detects the mouse but won't boot for some reason). I haven't changed any settings prior to this, tried safe mode; didn't work, startup repair doesn't help, and nothing seems to be loose inside the PC itself. Anyone have an idea on what might have caused this?