Everybody likes to play pranks unless, you're one of those serious guys. It's time to improve your pranking skills to make sure you're the best at it and also to avoid yourself from being pranked by others.
Pranks for your friend's computer
Language PrankYou could change their keyboard's input language.
How to change keyboard language in Windows 8?
User left click on "Settings (button)" in "Charm Bar".
User left click on "Control Panel (list item)" in "Settings".
User left click on "Language (link)" in "All Control Panel Items".
User left click in "Language".
User left click on "Add an input method (link)" in "Language options".
Flip Monitor's DisplayYou can flip your victim's monitor's display. How to do it ?
Watch your victim's reaction when they try to use their computer.
Change Mouse settingsWith mouse how much funny things you could do you can think yourself. Evil ideas started to come in your mind ? To change Mouse settings :
Here you can switch the primary and secondary buttons, i.e. left- and right-click funtionality, customize the pointer style, increase or decrease the pointer speed (super annoying!), or adjust the scroll speed of the mouse wheel -> Do changes according to your Preference that will Annoy your friend to your satisfaction level.
Change desktop's wallpaper
Make SPACE key write the word SPACE
Pretend to install Linux on a Windows User's PC
Create a shutdown shortcut that looks like a folder
Switch the Keyboard Layout To DVORAK
Plug a Wireless USB Mouse / Keyboard Into Their PC
If they do have a laptop and a wireless mouse, you can simply replace their wireless mouse with an identical-looking one, since it won’t work for their PC. They’ll assume their mouse batteries are dead, and you can move the mouse pointer around the screen with their mouse. The prank won’t last as long, but it will be every bit as fun.
Stick a Message Into their System Clock
Reverse their trackpad and mouse wheel scrollingYou can really throw somebody for a loop if you use a simple AutoHotkey script to flip their trackpad to scroll in the opposite direction. They’ll be completely confused! If they happen to have a laptop with a Synaptics touchpad, you can actually tweak this setting right in the Control Panel –> Mouse dialog, but otherwise, check out our article covering the script method, that should work anywhere.
Add funny words to Word Processor's Dictionary or Auto-Correct
You can just replace a properly typed word with a typo instead, or you can get in their face with something more fun, like making anytime they type their name end up replacing it with “[Name] is a jerk”.
For Word 2007 or 2010, head to the Office button –> Options –> Proofing –> AutoCorrect Options.
Setup Task Scheduler Jobs to Launch Random Apps (or a Web Page)
Even a serious geek is going to be pretty lost on how to troubleshoot a new tab repeatedly opening to a certain page every couple of minutes, if you bury that inside the task scheduler. Just go in and create a new task, run through the wizard and pick the browser executable, plug the site name into the arguments box, and then set the schedule to repeat the task every 5 minutes.
Set the Mouse Pointer to Look Always Busy (to Make Their PC Look Like It’s Hanging)
Nice and simple, but oh so fun! Just head into Control Panel –> Mouse –> Pointers and change the Normal pointer to the busy one. They’ll think their computer is hanging all the time, but it’s really not. For extra fun, you could make the mouse pointers gigantic.
Activate High Contrast Mode (with a Single Hotkey!)
There’s a built-in accessibility option that can be very confusing to somebody who doesn’t know how to turn it off, and it requires only pressing one shortcut key sequence: The great thing is that even if their computer is locked, you can enable high contrast with the icon on the lower left corner. On Mac OS X, you can press Ctrl+Opt+Cmd+8 to invert the screen’s colors.
Prank Wisely :)