When I install the latest drivers for my graphics card (which is a XFX Radeon HD 7870) I get this weird problem. Uninstalling the drivers make the problem go away, so I'm positive that's what causing it. And yes I'm also positive that it is the correct driver.
The problem I get is that thin, horizontal lines start flickering across the screen whenever I'm streaming a video online or using Photoshop. It also occurs sometimes when playing games.
I have checked the refresh rate which is 60Hz, so I doubt it's because of that. Any ideas what could be causing this? My OS is 64-bit Windows 8.