I've been having this issue for a few days. I tried contacting Microsoft, but I think we all know how that usually goes. So I came here hoping for answers. So basically all the icons on my start menu are flickering and respond slowly. My CPU is sitting at a normal temp and percentage, same with my HDD and my ram. So I don't think it's a hardware issue. Below I'll link a video that illustrates my problem. Any help would be greatly appreciated, because this goes past my technical know-how.