You can download a FREE trusted Anti Spyware program here.

They make their money via Advertising on this program, but they state state that openly, and there is no spyware within this program.

Beware, out of the hundreds of Anti Spyware programs, very few are trustworthy

NOTE: There are even versions of Spybot available which are actually riddled with spyware. If you were to install one of these, yes, it would run through your machine removing spyware. However, it would ignore the spyware which it had installed itself, and you would not be aware that you are infected.

Just do yourself a favour and get Spybot from a reputable source....