How did you install NAV2010? I would suppect that you either installed it on top of NAV2009 (the installer for NAV2010 will try and remove NAV2009 and save your settings to transfer to NAV2010) or manually uninstalled NAV2009 and then ran the NAV2010 installer. The older builds of NAV2009 (and NIS2009) had routines that left some of the registry settings intact. If you did not use the Norton Removal Tool, then you should follow the instructions below to get a clean install and fix your problem.
1) Copy your Norton key for safe keeping just in case you need it. You should not need this but it is better to have the key on hand than to need it and not have ready access to the key. You can find a copy of your currently installed key in My Documents\Symantec\Norton AntiVirus_Key.txt.
2) Download the Norton Removal Tool from this link.
Norton Removal Tool Choose the 2009 / 2010 product link and save the Norton Removal Tool (NRT) to your desktop. Directions are on the link page.
3) Download the latest version of NAV2010 from this link.
Reinstall After Removal Choose the ‘I have Norton Antivirus 2006 or later’ link on this page. On the next page you can download the latest NAV2010 full installation software.
4) Disconnect from the Internet until your system needs the connection later in the process.
5) Go to START > Norton IAntiVirus > Uninstall and let NAV2010 uninstall itself. It will want to reboot the machine. Let it.
6) During the booting of your system, go to Safe Mode by tapping the F8 key until the Advanced Options menu is shown. Choose the Safe Mode option (no network or command prompt).
7) In Safe Mode, run the NRT tool. When the tool is finished, click on the Reboot to restart your system.
8) Let Windows boot into normal mode now. If you do not have a good registry cleaner then I would recommend CCleaner (available from
this link). Install it and run the Registry cleaner; this will remove only broken / unused data (which would include some of Norton’s data now that it is uninstalled.)
9) Install NAV2010 by double clicking the file you downloaded and saved to your desktop in step 3.
10) When the installation asks for your key or says activating your product, reconnect to the internet then (plug your cable in or turn on the wireless card). [Note: The installation may not ask for your key and activate by using the previous key on the system. Your system will still need to connect to the internet at this point so updated definitions can be downloaded.]
11) Run the Live Update process manually until Live Update reports that there are no more updates to download, NAV2009 is fully up to date.
12) Reboot your system now to insure that any components updated during step 11 are loaded properly.
13) See if your error is fixed now.
Report back here with how this works for you.