Have you recently scanned your computer for ad/mal/spyware, with the latest updates ? If not, download and install
www.spybot.info and spybot; and/or
http://www.download.com/Ad-Aware-SE-...bj=dl&tag=top5
[ad-aware, both are free]
If you've already did that, post a HIjack log - [first, you have to download "hijack_This" program, which is also legally free -
http://www.tomcoyote.org/hjt/ ]
Regards,
keyshawn