ad aware (and also spybot iirc) quarantine items, so it may be that they are reading each others quarantines and finding these as spyware/malware.
I believe there is a warning regarding this conflict that appears if you install spybot S&D when you already have ad-aware on your system.
And just to add to what has been said... in order to prevent spyware from getting onto the pc in the first place, try installing spyware blaster
www.javacoolsoftware.com/spywareblaster/
MB