Stripes on screen

Jun 11, 2018
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I recently installed Fortnite on my computer. Just to say firstly my graphics are very bad, and while I was playing game I got a problem where are my screen was filled with random colored stripes, and I couldnt see anything. It also happened 2-3 years ago when i played Minecraft (when i was a kid of course :D). My components are:
AMD Radeon HD 6570
AMD Sempron 3850
4 gb RAM
Please help I beg of you