When we delete files or programs from our HD, those files usually leave traces of their existence. By that way, we can recover them if we delete them by mistake. That can be useful, but although dangerous...
Apps recommended for you
Use your Playstation 3 controller on your computer
Give Internet access to those who are barred from It.
Run Android apps on your PC
Emulate all Android apps on Windows 8
Configure your PS DualShock controller to play on PC
Get rid of any adware from your computer
The VoIP videocalling program par excellence