i was trying to go back to a normal preset in zgamevisualizer

in FL with the arrows. And then, when i kept pressing a *little* faster, it lagged and it had a small square of glitched out pixels. I immediately looked up a way to make it go away, and i found out that you need to restart your pc and stuff. So, restarted, bluescreened(really) and the glitched square was gone.

And then i never EVER tried to switch presets ever again.