Angel,
Whenever posting questions on these forums, please give us as much information as possible about your computer. We need the operating system, processor speed, amount of RAM installed, brand name of the computer, (if there is one), and any EXACT error messages you are receiving, plus in your case, the EXACT version of Norton that you have installed. The more information you give us, the better informed our answer will be.
In the meantime, the links below should help:
How to uninstall Norton AntiVirus 2000/2001/2002/2003
How To Completely Remove Norton AntiVirus 2004 and then reinstall the program
Hope this helps.
Grif
Some type of error has happened on my pc and when I reboot the system it gives me an error telling me some Symantec files can not be found. To reintall Norton. My system will not let me uninstall Nortons. I have tried just to install it again but it says I have to uninstall what I have.
Any ideas how to get Norton off the system.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic