Shortcut Key To Flip The Screen In the Windows TO 180 Degree..
This ones a cool one to play pranks on your friends, especially if your friends do not know how to get it back to the normal state 
The shortcut is
for normal windows : Ctrl + Alt + <Up arrow>
and for 180 deg it is : Ctrl + Alt + <Down arrow>
How ever you should know that these are default shortcuts for Intel Extreme Graphics Controller, and you can change them. To check / change or disable these keys go to control panel–>Intel Extreme Graphics–>Hot Keys.
Have fun 
.
Update:
Some users have written to me saying the shortcuts do not work. This happens when you have not enabled rotation feature in Display Settings under Intel Graphics Media Accelerator media. You need to enable rotation in order to be able to Rotate / Flip your windows screen upside down / 90 / 180 / 270 degrees.
Related posts:
There’s a same set of functions under Nvidia too.
They come under Nvidia control panel called NView.
It has better functions like multiple desktops, window transparency, autoresize etc.
I have it on my HP DV6000TX running Nvidia GeForceGO 7400 on XP.
Although this thing was missing on Vista. [:)]
This trick is uber cuil
… I’m having so much fun pranking my frieds 
@Jamie – I totally agree
Thank you for putting this out there. I bet you didn’t know you can do it to yourself by accident! Totally blew my mind and couldn’t find the fix while looking in help “sideways”.
@Jamie – I know it was scary the first time … but then once I figured out, trust me I’ve scared the hell out of most of my friends n family
Everyone shouldn’t prank friends. That is very mean of you.
Thanks, my 4 year old hit a few buttons and BOOM…what a mess…thanks to this posting …
Hi any help, I found out how to do this the other day but its not working on my other computer (the 1 im typing this with
Canadian kid, exactly same happened to me… cept was my niece not kid lol
THANK YOU I PRESSED THE WRONG THING AND IT FLIPED AND I DIDNT KONW HOW TO GET IT BACK THANK YOU
HI, I am using suse linux enterprise edition and suddenly i dont how but screen get rotate at 90 degree. please help me out.
i keep trying to mess with my friends by doing that at school but it wont work
@Bojangles – Which version of Windows are you using ?
that from your VGA driver not from your windows, just enable the rotation in your Display Properties
and for linux user you should enable the compiz to utilize your desktop
I love doing this to work mates computers while they are AFK
press window key nd control key wid arrow key
I cant flip my computer.
Im using a Windows Vista Ultimate by the way.
thank you for stopping me smashing my laptop! How does a toddler do that anyway?
@Jono – by mistake I guess, unless he/she was a computer genius in his previous birth
Thank goodness for your tip. My baby hit the keyboard and turned the screen round and i was going mad trying to fix it! thanks
Thanks alot
that was really gud trick for me god bless you !!!
had to get into the vid controller interface on my HP laptop to enable the hotkeys. (Windows 7)
wah!
Solved Tank you so mouch
Solved Thank You So Much
yes its a good pranks . It wasn’t working on my xp but Done what ever you mentioned and it is working now. Do you think it will work on windows 7 too.
I was worried from past two hours and just fixed my desktop.. thanks for your help
Thanks, was cleaning around the room and ended up with a very strained neck trying to find a solution. Hah. May I ask what functional purpose this serves- apart from pranking people that is.
**Was cleaning and hit keys by accident. obv.
I’ve been a heavy computer user and professional IT network administrator over the past 25 years. Today was the first time I ever accidently hit the keys on my laptop to that caused my display to rotate 90 degrees. It’s kind of bad business practice to have that feature enabled by default.
Thanks ALOT. Very useful information.
Resolved my issue.