Okay, then it's not a virus. It's malware/spyware. Sounds like it is running with a vengeance, too.
Above someone mentioned Ad-Aware. Download it and use it. It's free. Or you could pay for the professional version.
Would removing than reinstalling IE help---esp. if the spyware is in the IE file folder?
I had a problem like that---and it worked for me.
I have a cable modem---and use the Norton Firewall.
No problem since...