Problems with laptop screen, distorted with colored horizontal and vertical lines

From time to time, my laptop screen gets all distorted. It's split in 2 sections with random horizontal and vertical lines all across it. I have been facing this problem since the past month. After I switch it off and tu it back on in about an hour's time, the problem seems to resolve itself on it's own. What could I be dealing with here? Also noteworthy, I tried screenshoting the screen(when distorted) and pasting it on word to know how it looked like, the screenshot came out all fine with no signs of distortion where infact what I could see on my screen were colored lines.

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