Hi,
 
I've been trying to find a good way to remove the taskbar for ages without modifying system files, and today I found a way!
 
Im using the program called 'Taskbar Eliminator'. It just starts with windows and you can set it to show taskbar, hide taskbar, and whether or not it starts with windows.So very easy and simple, and extremely light on resources
 
Get it here:
 
http://aviassin.wikidot.com/taskbareliminator
 
Enjoy

Or ya know you can right click on the taskbar a select auto hide