Resiliant Popup

Hello,

I know popups are common and should be solved easily but I got one that I just cant get rid of. There are no obvious tasks, tried running adaware, spybot, pop up washer and cwshredder with no luck.

Everytime my user closes IE he gets a popup with this URL: http:\\www.pshnw6510990nmo-34nue7700.net/go.php?l=0019

Anyone have any ideas?

Thanks,

N