Oh Dave, why do you have to spoil things by asking something technical?!
Here's the FAQs from SB - this should explain it better than I could.
#1) What does SpywareBlaster do?
-Unlike other programs, SpywareBlaster doesn't scan for and clean spyware. Instead, SpywareBlaster provides protection against spyware ever installing and can also prevent spyware from running if it is already installed on your machine! SpywareBlaster can also protect against spyware/tracking cookies (this cookie protection function requires Internet Explorer 6 or above - the spyware protection mechanism even works on Windows machines without Internet Explorer).
#2) How does SpywareBlaster's protection work?
-SpywareBlaster works by settings "kill bits" in the registry. These "kill bit" registry entries are set for the spyware ActiveX CLSIDs (unqiue IDs that identify an ActiveX control). When a kill bit is set for a CLSID, the ActiveX control that uses that CLSID cannot install itself via your browser, nor can it run if it already installed. Microsoft sometimes uses these kill bits for fixing Active-X security holes.
#3) But what happens if I ever want to reverse or remove these kill bits?
-SpywareBlaster can do this for you. Simply uncheck every item that you wish to have the kill bit removed for, and press the "Remove Protection for Unchecked Items" button.
#4) How do I use SpywareBlaster?
-The easiest way of accomplishing this is to first Check for Updates (which are released frequently). After download all updates, press the "Select All" button on the SpywareBlaster main screen - this checks all items in the list to the right. Then, press the "Protect Against Checked Items!" button and your system will be protected against all spyware ActiveX controls in the SpywareBlaster definitions.
#5) Why are some items checked at the start of SpywareBlaster?
-Items that are already checked at the start of SpywareBlaster already have protection set for them.
#6) Why are some/many items marked in red?
-These items do not have protection set for them. If you would like to disable this highlighting feature, there is an option in the Settings menu to do so.
#7) I'm not sure if item "x" in the SpywareBlaster database is something I want to protect my system against. How do I get more information?
-All spyware items in the SpywareBlaster definitions are spyware or malicious ActiveX programs. However, there is a built-in information area in SpywareBlaster:
-On the SpywareBlaster main screen is a button entitled "More Information on Items". Pressing this button will take you to a location in the SpywareBlaster program where you can get information on the items in the SpywareBlaster definitions, plus you are provided with links where you can find more information online.
#8) What are those weird letters and numbers next to the spyware names in the list on the main screen?
-Those "weird letters and numbers" are actually the unique CLSIDs for spyware controls. Advanced users may find them very useful. If you find those letters and numbers distracting, you can disable the display of them in the SpywareBlaster settings area.
#9) I'm new to this "spyware" stuff. Where can I get more information?
-There are many places online that provide excellent information on spyware/adware. A short list of links to get you started is included below (copy and paste these links into your browser):
*Wilders.org -->
http://www.wilders.org*SpywareInfo -->
http://www.spywareinfo.com*Doxdesk.com -->
http://www.doxdesk.com