Uses behavioral analysis to protect against spyware and virus threats that are too new to be recognized by traditional software.

Automatically detects and can remove all common forms of malicious programs including Trojans, system monitors, keyloggers and adware. [Windows 98/2000/Me/XP/NT4]

Offering free and paid-for versions plus technical support. [Windows]

Offer SpywareBlaster, a tool which prevents the installation of ActiveX-based spyware, adware, browser hijackers and dialers. Immunization supports IE and Firefox browsers. Also offer a realtime spyware protection product.

Automated analysis of HijackThis log data that uses community feedback to help end users diagnose problems.

A product that uses real-time spyware monitoring and suspicious threat submission to build a reliable spyware definition database.

Anti-spyware and adware application.

Tool that removes various spyware threats. A free trial that locates spyware threats but does not remove them is available.

Hijack This-style freeware program featuring process killing, startup modification, and hash analysis, among other features.

Offers spyware removal software. [Windows]