Re: strange IP addi
Are you using the latest version of messenger? It could be an exploit in older....or current (for that matter) versions. Try uninstalling Yahoo IM, running all your adware proggys and then running your anti-virus and see if that fixes it. You may also need to reset your homepage. Since it seems to have hijacked your homepage, it sounds like some kind of adware/malware....but then again, if it's logging into an IP, it could be connecting you to a remote computer too (I think this is possible)....which would mean it's a "script kiddie"/"hacker".
Good luck, I hope all works out!
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