Error messages in XP Home SP3

I started a thread over a month ago about an MS Feeds error (link: http://forums.majorgeeks.com/showthread.php?t=189705) and I cannot remember how that situation ended up. I think that the PCs owner was in a rush and said "Never mind- I'll deal with the error messages". The message doesn't seem to have any negative impact and if you click "Don't send", things continue going along normally. However, now there is a new error accompanying the MSfeeds error. I have attached screen shots below: the first one is the MS Feeds error, and the 2nd shot is of this newer error. Here's what happens: if I launch IE, the home page opens just fine, but if I type a web site into the address bar, I get the error. I can click on links on the home page; it's MSN and the links like 'City Guide' and 'Movies' and 'Music' all open w/o errors, but if I try to go back, or click the home page icon (the little house next to the address bar), the error pops up: "The requested lookup key was not found in any active activation content".
:confused :banghead :mad :boxing :crap :crybaby :hammer :guns :tas