info/list

help my friends comp started sending instant messages with her messanger with
addresses like this www.yumaksarma.info/list an it doin it to mine now an
my sisters comp. everytime we get one it a different one ending with the
..info/list ... pls someone help us make it stop doin this
it keeps disconnectin our msn from our comps an sayin we are logged into
another computer... it drivin us nuts