Screen-corruption is the phenomenon in which the screen output is garbled, randomized, unreadable, or otherwise corrupted. This tag may include any problems involving improper screen display and how to alleviate the problem.
Examples:(these questions do not exist yet, or I am too lazy to link them)
Screen shows weird overlays
Screen is garbled at logout
New tabs in Firefox hold garbled image of previous tab
Icons don't keep positions on the desktop
Libreoffice zoom setting does not work