Okay...this took me near an hour of googling, but I can't seem to find it. If anyone knows WTF this is...can you let me know? It's about the following. When I see a black screen for whatever reason, then...well, just look for yourself. I basically opened paint and painted everything black. For some reason, it somehow renders the desktop background in it as well (guess which stock one I'm using ). At first, I thought there was some very slight transparency thing going on in windows 10, but after playing around with filling colors in paint I'm not so sure anymore. The thing is: it only highlights what's underneath it on black, dark grey and (strangely enough) purple. Dark or high contrast background images on any other color make no difference. the problem certainly started since I upgraded to 10 (from 8.1), but I have no clue whether it's the OS, my video card or even my actual monitor. Anyone here have an idea?