1. Hide all their Desktop Icons
This will cause immediate panic when your friend checks his laptop and he will start searching his trash but will find nothing.
2. Change the Cursor to Waiting
Speed is an essential criterion before one decides to buy a laptop, everyone wants their laptop to work fast and efficiently without having any lag. Having to wait is the worst feeling for a user.
If you change the cursor to the Waiting symbol, it will create an impression that the laptop isn’t functioning properly or there is a background task which is not responding. Just go to the Control Panel then Mouse Settings and then chose the waiting cursor from the list.
3. Changing System Settings to High Contrast
This completely changes settings of the Computer and it becomes tough to work. Users might also think there is a problem with their monitor and consider getting it repaired. The best part about this trick is that it is known to very few people. To enable the High Contrast Mode just press Shift, Alt and Print Screen buttons altogether.
4. Adding Funny Screenshots as Wallpaper
Just add a few strange folders on your friend’s laptop, take a screenshot and make that the wallpaper. This will get very irritating as the folders will be visible on the desktop but your friend will be unable to open them. It will take a while for your friend to realise what’s wrong.
5. Password Protecting all their Folders
To do this, you will have to right-click on the folders and go to the properties section and encrypt the file/folder. This will successfully piss your friend off, as his laptop is going to be useless. Unable to open any of the necessary files or folders.