I'm repeatedly getting 8920,223 errors this week even after I manually downloaded the 64-bit virus definitions from the Norton support page. I have Norton 5.1.0.29 through Comcast. Windows 7 - 64-bit.
This time the message is the Norton 2011 Iron Whitelist and Norton Activity Map Data failed to update. It looks like the critical updates are being applied but the recommended updates are not.