First off if Norton is acting that wacky, you may have a virus. First thing most viruses do is attack your AV program.
Recommend you run this free online java-based scanner to see if you're infected:
http://housecall.antivirus.com/
One you're sure the system is clean, uninstall NAV, Live Reg and Live Update (in that order).
Then re-install NAV.
If you can't uninstall NAV then you can do it manually (just make sure you don't have any viruses first).
- Uninstall Live Reg and Live Update if possible.
- Do a file search for "Norton" and then (seperately) for "Symantec". Delete all folders containing those names.
- Run Regedit and delete the following registry folders if they exist:
HKEY_CURRENT_USER\Software\Symantec
HKEY_LOCAL_MACHINE\SOFTWARE\Symantec
- Reboot. You will get several file not found errors on bootup concerning Norton DLLs that Windows wants to load but can't find. Just hit okay to get past them. Once back into Windows, re-install NAV.
As a side-benefit your system will think this is the first time you've ever installed NAV on it and you'll the default 1 year subscription
Hope this helps...