How do I remove Norton Antivirus *after* I have installed Lion?

You should run the removal applicaiton that came with your installation. Read this from the Norton web site..https://www-secure.symantec.com/norton-support/jsp/help-solutions.jsp?product=No rton+for+Mac+Products&version=current&lg=english&ct=united+states&pvid=f-mac&doc id=v64924250_EndUserProfile_en_us/

Norton AV 12 for Lion is available online.

If you want an AV program compatible with Lion then look at Intego Virus Barrier 6.

If it's a school-issued computer, then the school decides what software is installed on it. Contact the IT department if you have a problem.

You didn't say what version of NAV you have, so this may or may not help:

http://service1.symantec.com/SUPPORT/num.nsf/docid/2002020713322311

There is a list, In fact, if you search the site they should give you directions for manual deletion.

Or you might try AppCleaner

Actually, I just took another look at that link, and it looks like it's for Mac OS 9, so way out of date. Try this:

http://www.symantec.com/business/support/index?page=content&id=TECH103489

Ultimately, most of the experts here stay far, far away from Norton, so we're just going to be doing the same thing you could do: Google something like "manually remove norton Mac" and try some of the results.

Far, far away. The last Norton disk I had back in 1999 did such wicked stuff to my system I was still erasing files at the root level of the HDD until around 2005. I put the disk in a plastic freezer baggie, so as not to contaminate anything and deposited it in a medical waste container.

If someone posts a direct link to a Mac OS installer package for the particular version of Norton that's at issue, I'll take a look at it. Otherwise, as a last resort you'll have to back up all data at least twice, then erase the boot volume and do a clean reinstallation. When you reboot, you'll be offered various options for setting up from a backup or an existing startup volume. Choose to restore only user data and settings, not applications or other files. Reinstall the software you want manually.

No good. That file is 7 years old and not an installer package. Clean install.

As long as it is too late for its uninstaller, try a 3rd party uninstaller, e.g. AppZapper or Uninstaller etc. Search macupdate.com for more. I purchased AppZapper on the occasion of a MacHeist promotion, if my memory is not wrong, and am entirely satisfied with it. Of course, I do not know whether it cleanly remove your antivirus.

I do not ask why you have been keeping it for such a long time.

Try this file:

http://www.symantec.com/business/support/index?page=content&id=TECH103489&actp=s earch&viewlocale=en_US&searchid=1329757937697

Sorry.. this site is on the Norton for the mac support site.. you can fish around for it on their site.

If you're still in school then you should be able to go to your support group at school and have them "fix it".