Donna over at Calendar of Updates has posted a second test regarding the viability of free anti-malware and free anti-spyware programs -
Malware Detections of Free Anti-Malware/Anti-Spyware
see
Malware Detections of Free Anti-Malware/Anti-Spyware - Calendar Of Updates
For those who don't know, Donna also previously posted another test,
Rogue Detections: Old, Not So Old and New Threats
see
Rogue Detections (old, not so old, new threats) by malware scanners - Calendar Of Updates