If your like millions of other smart people who like to have their computer at least somewhat clean of spyware and malicious code, its likely you use SpywareBlaster.
The current version is at 1.4 but there is an issue with automatically updating/installing new detection rules.
If your having an problem with updating through Spybot, go to their
download page and manually download/install the file:
Detection updates 2006-01-06
Make sure to close Spybot while installing the above file.
After you've installed the file, open Spybot and search for updates once again. This time the automatic updater will work. Install the updates through Spybot then scan your PC.