Spyware blaster is not a scanner,but it is good to have,reasons being.
Prevents the installation of ActiveX-based spyware, adware, browser hijackers, dialers, and other potentially unwanted software.
Block spyware/tracking cookies in Internet Explorer and Mozilla/Firefox.
Restrict the actions of potentially unwanted sites in Internet Explorer.
MS anti spyware:I have it and don't see anything special about it.
Any one of these better than the other. Right now I am using AVG, Spybot, and Ad-aware. I am not sure I need a fourth program or not but I found these and people seem to like them both. Any advice would be appreciated. Thank you