Here’s a site which lists out all the “suspect” anti-spyware software available on the net. Some of these anti-spyware end up installing their own spyware on your PC. So before you go ahead and install a new anti-spyware solution on your PC, check them up with this list.

” Some of the products listed on this page simply do not provide proven, reliable anti-spyware protection or may be prone to ridiculous false positives. Others may use unfair, deceptive, high pressure sales tactics to scare up sales from gullible, confused users. A very few of these products are either associated with known distributors of spyware/adware or have been known to install spyware/adware themselves. ”

Link: Spyware Warrior: Rogue/Suspect Anti-Spyware Products & Web Sites