Did you walk back to your computer after lunch to find your entire screen is upside down? You have fallen victim to one of the most common office gags. Read this article to find out how to undo this.
Holding down CTRL and ALT while pressing the DOWN ARROW flips the screen upside down.
To undo it, and flip it back to normal, hold down CTRL and ALT and press the UP ARROW.

The computer next to me was also hacked. It showes evrything in NEON colors. Any idea how to fix it?
Wow! Excellent! Thank you for giving such a quick, staright answer. It worked!
Just wanted to say ‘THANK YOU SOOOO MUCH’ – I didn’t know if I’d been hacked or if I had a virus. And it was my wife’s computer!
Phew – I can stop sweating now . . .!
Thanks! My cat layed down on my keyboard and flipped it upside down. It made me sooooo mad. This helped a ton (:
Thanks soooo soooo much!! I was trying something on Photoshop and it just flipped and i had to read this whole article upside down >.< Thanks sooo much!!
Thanks so much for giving good solution of screen up side down.
The ALT+CTRL+ Up/Down Arrow Key didn’t work for my rotated screen, I have an older Dell desktop. Any ideas???
it didnt work for me.
omg thanku so much help
Is it true this Doesnt work for laptops??
I have windows 7 and ive tried this over and over again and its not working ?
can anybody please send me an email telling me what to do
ive tried the ctrl + alt + Down arrow and it did not work then i tried Davids way ctrl + sht+ R and its still not working
please give meh sum 411 on this xDD thnkz a bunnch
Damien
Thanks for this. I work in IT and never heard about this. My daughter and friend must have hit just the right keystrokes and flipped the screen. My wife called me frantic that the PC was now shot. Your tip worked great and now I’m the hero. I’m gonna have fun with this at work
I was just wondering if there was a good technogical reason for an upside down screen… or is it just there for a gag? ;=)
This DID work and it doesn’t just work for a laptop. It worked for my computer and it is a Dell. It happened the same way with my. I have two preschoolers and after I walked out of the room for a minute the screen was tilted. I was able to fix it after going to this site. Thank you very much!