Pop up virus

Hi
Me again. My other PC also has a virus. When I open IE, or a new page, a pop up comes up. Now I know pop ups are normal, but normally my IE blocks them. However, in this case, the pop ups are related to the site Ive gone to and are always the same ones. If I go to a new page a new, related pop up comes up, and the same one will appear if I go back to the website I was accessing. Weird.

Again Avast nor adaware seem to pick this up.
Traveller

[font=Segoe UI] Are you using any proxy server? If yes, please consider removing connections to it.

http://h1.ripway.com/chronoboi001/HJT.jpg
Please download HJTsetup.exe
2. Save HJTsetup.exe [preferably, in your desktop.]
3. Install Hijack This to C:\Program Files\Hijack This.
3. Continue to click Next in the setup until you get to see Select Addition Tasks.
4. Put a check on Create a desktop icon then click Next. Continue following the next prompts until you reach the last part.
6. On the last part, click Finish. Hijack This Main Menu will appear.
7. Click on the Do a system scan and save a logfile button. A scan will be processed and when its done, notepad will appear.
8. On notepad, copy the entire log through clicking on Edit > Select All then click on Edit > Copy.
9. Head back here in the forums and paste the copied files onto your next reply.

NOTE: DO NOT let Hijack This fix anything yet.