March 9, 2012 8:47 AM PST
in the topic
How do I? in the forum
Support
Running as root means that any I/O action has full access to every aspect of the operating system. Any input from the mouse, keyboard, or even internet connection has full permission to alter anything on your system. If you make a typo or click in a wrong place, your system immediately performs the action. Worst of all, you are then as vulnerable to an internet intruder as you were on Windows - though Windows malware doesn't work and a virus doesn't propagate in Linux.