Wikipedia
SpySubtract
SpySubtracter was the name of an Anti-Spyware application for Microsoft Windows developed by InterMute. It is now maintained by Trend Micro under the new name of Trend Micro Anti-Spyware.
The program is shareware, and is available to download as a 30-day trial.
Previously, SpySubtracter was often pre-installed on new desktop and notebook computers.