I was cleaning up a laptop for a friend the other day and spybot wasnt scanning properly, so I installed and ran ccleaner, which did its thing, then I re-ran spybot and it picked up all sorts of carp!
I gues some nasty was blocking the correct operation of spybot.
So my advice is to attack from a few angles and you should be able to get rid of the prob. also uninstall adaware and re-install it afterward.