Last Sunday night i did a norton anti virus full system scan and a live update. After it finished i went to my home page (yahoo) and in my toolbar was something called toolbar 7.1 i tried to find it and delete it but my computer started acting crazy and doing things on it own. I eventually shut it down went to my Wifes computer and looked up toolbar 7.1 and cnet techs called it a very aggresive trojan that was very dangerousand would record all my information and sell it underground. In order to get it off your computer effectively you had to buy a 20 dollar program. After talking with a cnet tech offline they told me there are free system scans that are available but no guarantee to work. The tech then said they know the 20 dollar program does work but is very time consuming and he thought the trojan was made by the company selling the 20 dollar program. As he was telling me this i crashed my computer and started all over (not fun)
Just be carefull folks.