It's sometimes problematic. It could be a malware, I suspect it, check that, but it could also be an issue with your video card. If malware check with, say, Malwarebytes, doesn't produce results, you could try to unistall - reinstall your video card stuff, all of it, preferably with Revo Uninstaller. These drivers come with a lot of stuff. Then, reinstall - you could try with the original drivers.