Internet Explorer back button - ad.doubleclick.net

[be_true2]

My Back button in Internet Explorer keeps showing http://ad.doubleclick.net...

The extra back button on my mouse is now useless because I have to mouse up to the Back button drop-down, and select where I want to back up to. (sometimes 3-4 places back)
If I just click back, it just reloads the same page I am on.

I'm not sure when this started, but I want to annihilate it!

I am running:

Win XP Home SP2
ZoneAlarm Pro (installed, currently shut down)
AVG 7.0
Ad-Aware SE 1.05
Spybot-S&D 1.3
Spyware Blaster 3.2


Any Ideas?
-Chris

[computer_kid1]

update all your anti-spyware programmes

go into safe mode then run a full scan with them

[ShadeZeRO]

actually whenever i goto alot of sites (including sysopt) i see it trying to load ad.dooubleclick.net...

but luckely Peer Guardian blocks that site, as well as most other spyware sites.

[be_true2]

Spybot S&D
Ad-Aware
AVG
Microsoft AntiSpyware

All are updated, none found anything.
And ad.doublectick.net is blocked via host file.

Why would it show on the back history, when it is only single graphics from a web page?

-Chris