Uninstalling Norton Antivirus to run Avast

I have a portion of Norton 2005 trial version installed on my computer, and I can’t delete it when I go to ADD/REMOVE programs. Can you tell me how I can get rid of Norton off my computer for good. I have Windows XP/home edit. Thanks for any help.

See: http://forum.avast.com/index.php?topic=12169.0 and http://forum.avast.com/index.php?topic=9578.0
You’ll see how important is it to completely remove Norton…
Welcome to avast 8)

You can also look at www.ComputerSecurity.tk, last paragraph.