Damn iFriends Popup

For the last couple of days I noticed that when I start my computer a ifriends ad pop up would appear. So I tried my AVG Anti-virus and found nothing. I the tried Ad-aware and Spybot S&D again nothing, nada, zip. Well I tried a few other programs (reg edits, reg cleaner, etc.) still no help. So I restarted my computer a hope bunch of times looked around and finally find where it was hiding on my computer ("c:/WINDOWS/ConfigSys"). I deleted everything in the folder and restarted windows. With my fingers crosses it started and *Poof* it was gone.

D