Article: "Are You Wasting Your Money Buying Antispyware?" by Larkin, Erik; PC World Jan. 2008 Vol. 26

There is no point using antispyware because they can only block about 38% of all the unwanted "pop-ups". The best choice would be to use antiviruses because they can detect up to 95% of all the unwanted programs and viruses. Antispyware products are only good to remove spyware from an infected system. The best choice would be to have only antiviruses to avoid any viruses and unwanted programs.

I personally think that there need to be more antivirus componets added to the antispyware in order to make it safer to use and to allow it to block more viruses and the unwanted "pop-ups".