Occasionally when I tab out of Minecraft, I will re-enter into my Minecraft tab just to have it instantly close. There seems to have no pattern when it crashes and when it doesn't, as sometimes it will be perfectly fine with opening again, while others it doesn't. Seems to be about 50/50. Occasionally my Minecraft won't get passed the stage of loading before freezing and having to be closed. I would assume this was a mod acting up however this happened across multiple versions and in complete vanilla. The reason I place this here is because I'm unexperienced with mods and this appears to have begun after beginning to use mods.
Upon crashing, there are no anomalies in the java report log. Occasionally when crashing, my screen will have stray white pixels just before crashing, with them appearing almost as in a pattern, though never the same. For some reason, I managed to have a half-crashed game or something and get the pixels that appear before crashing without actually having crashed. Screenshots (not from in-game, they didn't show on those) included. These pixels disappeared when the tab wasn't focused and reappeared in different spots when in focus.
Java Build 8 - Update 131 (Yes I know it's slightly out of date but its never been an issue)
Windows 10 - 64 bit
The most recent versions of (all 1.8.9);
Please help, I've tried reinstalling and everything. It's not deadly important as it never crashes in the middle of something, only when I tab back in, but it's beginning to get annoying.