This is strange. I should have taken a screenshot or something but the problem is pretty easy to picture. Although I only say 'dead' pixel in the title because that is more commonly known than the name 'stuck pixel' which is more accurate to what I saw.
I was in the middle of typing in a forum and suddenly noticed a tiny red dot, a pixel sized dot, sitting just right of center on my computer screen. My initial reaction was as to be expected. I thought: "Well oh damn, my laptop monitor is about to start dying bit by bit. Best put some seizure-inducing colors on my screen to temporarily fix the issue."
Of course, I panicked a bit when it didn't work.
Out of frustration I hovered my mouse under the spot... except it wasn't under it. Whatever is there is under my mouse but over everything else. That simply cannot be a stuck pixel. I brought up the task manager, wondering if there would be anything I could get out of it, but I hardly have a good memory of what programs run on my system, so I was just lost there. Also the task manager layered over it as well.
I have run various virus/malware scans since then and come up with nothing. Googling stuff like "background program causing red pixel" gives me nothing but tutorials for lost/dead pixels. I'm pretty much lost here. Ultimately though, it went away when I restarted and I haven't seen it again.
However that still leaves me unsettled that I have no clue what that was. Does anyone here know what I saw? Anyway of finding out if I ever see it again?