ZdNet and PCMag and all big companies always favour Zone-Alarm and i dunno why...and as for this rating i give balls to it!
ad-aware and especially Zonealarm is nowhere in anyone's top-ten list!
Za's anti-spyware is good more at prevention than is curing and detection!
In my view,
1.Spysweeper,
2.Spyware Doctor,Ewido
3.Spybot S&D,
4.counterspy/Ad-aware
5.Pc-Cillin Anti-Spyware,
Sorry this topten-review and other site s mis-lead you,goto pcmag.com or pcworld.com for better knowledge.