Quick question, need computer help

[viruscore1]

It could be the monitor, the video card, the video cable, or the computer.
First step is to isolate the problem. Try a different monitor, a different video cable, and if your PC has multiple video ports/cards, a different video port.
If running Windows, reboot the PC in safe mode (Google how to do that). Windows will the lowest level of graphics in that mode.

That's what i did at first. The windows update fixed problem.

 

[Slartibartfast]

If ok at POST then you may still be on Windows 8.1? Rollback the video driver to fix.

 

[Max E.]

http://www.tomsguide.com/answers/id-3326148/grey-screen-cursor-startup.html

This fixed it thx alot! and thx to everyone else for the responses.