Interesting. I wish I knew why this seems to happen with Norton because the
Symantec installer should be smart enough to disable the Windows firewall.
Go ahead and disable the Windows Firewall and try updating. If that works,
would you please let me know? You can contact me off the newsgroup by going
to my blog (
http://msinfluentials.com/blogs/jesper) and clicking the Contact
link.
To disable the Windows Firewall do this:
1. Open the Control Panel
2. Open the Windows Firewall control panel
3. Click "Change settings."
4. Accept the elevation prompt
5. Check the "Off (not recommended)" radio button.
6. Click OK.
Now try updating Defender. Please let me know if this works. I would tell
you how to disable the Norton firewall, but I do not have it, so I do not
know.