honestly...im out of ideas.
You could try lowering refresh rate, but i doubt that will do anything. or
Reinstall windows.
Try your gfx card on someone elses pc
Clean out your gfx card
Im just throwing out possibilities, so dont count on it.
Im still trying to think, and trying to search if anyone had the same problems.
Somone did mention something about applying too much light and then it flickered, but he wasnt specific enough. It could be brightness, etc.
Maybe it could be your internet?
Hopefully someone else can give better advice.