Removing Norton Anti Virus

First check to see if Norton has a uninstall located in the Start Programs under the Norton heading,in cascade menu will be the uninstall feature,this should be used first to uninstall the Norton Anti-Virus and then you can remove all instances fromthe registry.
You will need to reinstall the program and then start the uninstall process,also using TweakUI utility if downloaded will be helpful in Removing installed programs

If you still can't get it to work after trying Soulriders suggestions, you can download Regcleaner from this site

http://www.jv16.org/

Make sure you read through the help section, not for the inexperienced.

I ran into this problem last week. The uninstall info was corrupted and the uninstall could not continue. It was necessary to manually uninstall.
Here is the link to symantecs's instructions for manual removal. Or just got to symantecs site and service and support and navigate your way to the knowledge base.http://service1.symantec.com/SUPPORT/nav.nsf/aab56492973adccd8825694500552355/148515ef25eeb79788256a70006448f5?OpenDocument&prev=http://search.symantec.com/custom/us/techsupp/kb/query.html?*col=kb%20us*st=1*nh=10*pcode=nav*qp=url:/nav.nsf/aab56492973adccd8825694500552355,url:us-sarc,url:us-lu*qt=uninstall%20NAV*miniver=nav2001*sone=nav2001_tasks.html*stg=3*prod=Norton%20AntiVirus*ver=2001%207.0%20for%20Windows%2095/98/Me/NT/2000*base=http://www.symantec.com/techsupp/nav/*next=nav2001_contact_tscs_solve.html&sone=nav2001_tasks.html&stg=3&prod=Norton%20AntiVirus&ver=2001%207.0%20for%20Windows%2095/98/Me/NT/2000&base=http://www.symantec.com/techsupp/nav/&next=nav2001_contact_tscs_solve.html&src=&pcode=nav