Take a peak at this... looks like just might need to do what is in the link, at least you will know what it is:

http://www.symantec.com/business/support/index?page=content&id=TECH104310&locale=en_US



>I use Comodo personal fire wall on my XP computer. During the past couple of days I get a lot of messages of this dll - wxvault.dll - being a component of many programs is trying to access Internet. If I deny it, I can't even open a browser. So I basically have not choice but to allow it access Internet. So why do I need Comodo at all then? Sometimes I think i would be better off just uninstall/disable Comodo. What do you think?