Spyware Removal Programs
Microsoft AntiSpyware
http://www.microsoft.com/athome/security/spyware/software/
(as of February 16, 2005, freely available updated beta software for novice users)
Spybot - Search & Destroy
http://www.safer-networking.org
Recommended for Windows 98/ME users
Ad-aware
http://www.lavasoftusa.com/
Has a tendency to fail in cases of severe existing infection; may need to run in "safe mode"; free version does not actively prevent new infections.
PestPatrol
http://www.pestpatrol.com/
Spyware Doctor
http://www.pctools.com/spyware-doctor/
Spy Sweeper
http://www.webroot.com/
Spy Subtract
http://intermute.com