From the submitter:
This was a photo from my work, where apparently someone had been using a program they weren't meant to, so the boss simply put white-out on the computer screen to prevent him using the program.
Another possible solution: The Dark Tower. You just might not want to read the ending though, lest your anger cause you to topple your creation.
Retro computer challenge: to recreate this kludge set your monitor resolution to the lowest possible setting and the colors to like... 6. Enjoy!