Cheers for additional advice, I already have Spybot-S&D and CW Shredder, and now considering trying the Lavasoft Adaware to replace my Spysweeper. Don't believe I have any current infections to worry about.
I've just done a first scan with Adaware SE but am a bit confused why it is reporting on it's scan 49 objects (of MRU lists type - negligible)? Do I have to tell it to ignore these. They all seem to be about shortcuts or lists of recently used files and programs.