Thou shalt not run thy computer with Spyware Blaster alone.
You should have a good virus protection program, Spybot Search & Destroy, Ad-Aware SE.
A good firewall would also be nice.
Hope this helps.
Since i installed (and paid a small sum for) Spyware Blaster i have not had even ONE instance of spyware detected.
I run Adware also plus Microsoft Antispyware..and just for the heck of it ( & why not..huh?) Spybot Search & Destroy. Aside from the small outlay for Spyware Blaster the others are, as you know, free for personal use.
After experimeting (a costly experiment) with other rather pricy spyware detection software, which interfered with my antivirus protection & had to be uninstalled...i cannot stress strongly enough TRY the above combination for yourselves.
For your information i have been running all of the above for over 6 months now..and , yep..NO spyware of any description.
Give them a try, you have nothing to lose except the spyware.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic