Microsoft, after a long time has finally decided to tackle the issues of adware and spyware first hand. Microsoft has come out with their own spyware removal/detection software, which also includes active protection against spyware installing itself when browsing the Internet.
It is highly recommended that anyone using Windows 2000 or XP install this software.
If you have a P.C. and browse the Internet you have spyware on your computer. Period. The program is free and works wonderfully. Get this program, or buy an Apple computer.
Microsoft Anti-Spyware
Note: I have found that this program detects more than Spybot and also has active shielding.