Spybot - Search Destroy detects and removes spyware, a relatively new kind of threat not yet covered by common anti-virus applications. Spyware silently tracks your surfing behaviour to create a marketing profile for you that is transmitted without your knowledge to the compilers and sold to advertising companies.

Scotty the Windows Watch Dog sniffs out malicious "mysteryware" and parasites that may assault your computer. WinPatrol puts you back in control of your computer so you'll know what programs are and should be running at all times.

Malwarebytes' Anti-Malware can detect and remove malware that even the most well known anti-virus and anti-malware applications fail to detect. Malwarebytes' Anti-Malware monitors every process and stops malicious processes before they even start.

SUPERAntiSpyware Professional will detect and remove thousands of Spyware, Adware, Malware, Trojans, KeyLoggers, Dialers, Hi-Jackers, and Worms. SUPERAntiSpyware features many unique and powerful technologies and removes spyware threats that other applications fail to remove.

Scans your computer for known data-mining, aggressive advertising, and tracking components. Remove or quarantine the components. The program detects a wide range of adware/spyware related issues. The free version is strictly a scanner, and does not provide any real-time protection.

Spyware Terminator is a feature packed adware and spyware scanner with real-time protection that can remove or quarantine spyware, adware, Trojans, keyloggers, home page hijackers and other malware threats. The scan behavior can be customized based on your level of experience, ranging from automatic interception to complete user control over how to handle any potential threats. Spyware Terminator offers manual and scheduled scans as well as real-time protection for your browser settings, HOSTS file, startup entries and other system areas. The program can optionally use ClamAV for additional virus protection. Other features include a file

Windows Defender is a free program that helps you stay productive by protecting your computer against pop-ups, slow performance and security threats caused by spyware and other potentially unwanted software.