From Computer Stupidities:
A friend of mine told me that when he was in junior high school (mid-to-late nineties), they got a computer in the classroom free for the students to use during breaks. The first thing many of them would do to was to change the dull Windows 95 desktop. The school’s IT Manager for some reason thought of this as vandalism, so he frequently fixed it in the only way he knew how — by reinstalling Windows.
I was almost on the floor laughing when my friend told me about how the IT Manager had come into their classroom one day and told the students, “Will you STOP changing the desktop background? I’ve had to reinstall Windows every day for the last two weeks now!”