I decided to try the *free* scan on my own pc.
It was formatted and completely reinstalled just yesterday.
It scans clean with Avira Antivir av,Spybot S&D,Windows Defender,Eset(NOD32) online scanner and BitDefender online scanner.
Spyware Detector found 119 threats:
9 tracking cookies
110 *other references* including 5 trojans!
The cookies were all general Firefox profile cookies(harmless).The rest consisted of 109 registry entries inserted by SpywareBlaster (to protect the pc) and 1 harmless Windows Dll file.
If it fixed your problem it clearly isn't completely useless.
But it certainly uses a large number of false positives to get you to part with your cash.