The microsoft forums are the one place that could be fully automatized. You post a problem about anything, really anything. Can’t change wallpaper? Can’t login? Screen flashing? Files disappearing? Constant loud pitched noise? It’s all the same. The answer, whatever your issue, is sfc /scannow, “Restoration point” and “Reinstall”.

And arguably, that last step will most likely make the issue go away, at the price of not having a fucking clue as to what was wrong, losing a lot of time afterward, and having a fair chance of re-doing the same things, causing the issue to show up again. Great stuff.