POP-up that won't go away even after.....

...I have ran several cleaners/removers.

I have XP SP2 with Zone Alarm, also have used Spyware Doctor, and Malwarebytes. Each has found and fixed several problems and yet I continue to get this pop-up ad about every 5 minutes. I have all my security set high and settings to not allow pop-ups, but it still keeps happening. This one's really pissing me off.
I have noticed that when I disable the internet it doesn't happen.

It is labeled:

http://mtn6.com-com.ws-advertizement-Internet Explorer

Any information on how to stop this pop-up, would greatly be appreciated.

Thank you!!!!!!!

 

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Please follow the instructions in the below link and attach the requested logs when you finish these instructions.

• READ & RUN ME FIRST. Malware Removal Guide

• If something does not run, write down the info to explain to us later but keep on going.

• Do not assume that because one step does not work that they all will not.

Notes:

1. If you run into problems trying to run theREAD & RUN ME or any of the scans in normal boot mode. You can run steps in safe boot mode but make sure you tell us what you did later when you post logs. See the below if you do not know how to boot in safe mode:
   
   • Starting your computer in Safe mode
2. If you have problems downloading on the problem PC, download the tools on another PC and burn to a CD. Then copy them to the problem PC. You will have to skip getting updates if (and only if) your internet connection does not work. Yes you could use a flash drive too but flash drives are writeable and infections can spread to them.