Apparently reinstalling Windows with "Other OS" on BIOS fixed it. I was using Windows 8.1 WHQL. -- A fix I found on another forum.
Another piece of advice was to run DDU in safemode (unstalling all graphic drivers), then reinstalling the driver manually once it rebooted.
Some others suggested that:
"Another freaking info: enabling the driver's anti-aliasing seems to fix it (lol).http://pasteboard.co/mqywDIYgN.png"
Other's said the driver update fixed the issue. So use DDU to remove any remnants of the old drivers for your graphics card and download the new drivers from the site afterwards.
Another fix was to change the Window 8 boot to Other OS.