I have had an issue before with Norton Anti-virus, not Norton Internet Security because I do not want the NIS for being overly-cautious
, and its related to voice chat, everytime I use VC in Y!M, NAV will pop-out an alert indicating that Y!pager could be a "worm"
(whew! nice program) so I have to exempt Y!M in the setting of NAV. Maybe you could try to configure your security, maybe there is some exemption setting there
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By the way, this has been an issue with Y!M, do you have Windowblinds installed in your PC? Please do a search of this program in your system, and if you do have it, set it to "ignore" Y!M.
If this does not address your issue, post back for others may have other ideas!