One of the coolest pranks you can play on your friends in your locality or school is, flip windows screen of their computer. However, before you perform this little trick, you need to ensure that they have enabled screen rotation on their computer. To check if they have enabled screen rotation: 1> Click 'Start' --> 'Settings' --> 'Control Panel' --> Search for … [Read more...] about Enable Screen Rotation To Flip / Rotate Windows Screen 90 / 180 / 270 Degree