Sounds like a browser hi-jack to me. Download and install Spybot and
Ad-aware (they're free). You can find them by doing a search on
Google.
Install them and make sure you get the latest update/patches (open the
program and click "update") for them.
1. Reboot the machine.
2. Once your machine boots up, DO NOT RUN IE.!!! Run Ad-ware in Deep
Scan mode. Clean everything it finds.
3. Run Spybot. Clean everything it finds.
4. Reboot the machine
5. Once the machine boots up, DO NOT RUN IE.!!!
6. Repeat the steps 2 and 3
7. Reboot the machine.
8. Try IE
If that doesn't work, downlaod and install Hi-JackThis post your log
on their forum site.
http://www.spychecker.com/program/hijackthis.html