SpyBot Search & Destroy is one of the most popular application in charge of removing any spyware in your system This application has a clear and simple interface which makes this utility very easy to use.
License:
OS Support: WinXP, Win2003, Win2000, Win Vista

Spyware Doctor is a security tool which will be in charge of blocking all viral codes known as spyware, trojans, trackware, malware, keyloggers, adware, and many more.
License:
OS Support: WinXP, Win2003, Win2000, Win Vista