SpySubtracter was the name of an Anti-Spyware application for Microsoft Windows

Microsoft Windows

Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

 developed by InterMute. It is now maintained by Trend Micro

Trend Micro

Trend Micro Inc. is a computer security company. It is headquartered in Tokyo, Japan and markets Trend Micro Internet Security, Trend Micro Worry-Free Business Security, OfficeScan, and other related security products and services...

 under the new name of Trend Micro Anti-Spyware.

The program is shareware

Shareware

The term shareware is a proprietary software that is provided to users without payment on a trial basis and is often limited by any combination of functionality, availability, or convenience. Shareware is often offered as a download from an Internet website or as a compact disc included with a...

, and is available to download as a 30-day trial.

Previously, SpySubtracter was often pre-installed on new desktop and notebook computers.