Browsers (video included)

YouTube - Browser Screen Bug

For some time now, I've experienced something annoying in every of my browsers. As you can see in video, it happens when I scroll up but not down (it happens on every website, not just Msn). In rare cases I've also experienced something similar on the desktop, but a reboot fixes that. I've checked around the internet but I can't find anyone with similar problems.
Can anyone help?

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