Shoutbox

Ok, I am sorry if I posted this in the wrong section, but this is really bugging me and I am new to this forum. The other day, I got an IM from a contact (my mother) and it was a link to something like buddypics.com or something similar. Like an idiot, I thought she was sending me a link to some pictures she uploaded. I tried to login in to the site and couldn't get in. Now, every so often I will get an IM from somebody offline to some weird website (i.e., nice.checkbiz.info or something similar). I changed my Windows Live password, but still get these messages. I ran a virus/spyware scan and can't figure out what is going on. Does anyone have an idea of what this is or how do fix it?

thanks.