Spyware is a general term used to describe software that performs certain behaviors such as advertising, collecting personal information, or changing the configuration of your computer, generally without obtaining the user's consent.

Common indications that a computer may be infected with spyware include frequent pop-up advertisements, the changing of a homepage to another web page, or the presence of difficult-to-remove toolbars that the user didn't install.

There are several third party spyware removal tools available that can assist a computer user in removing spyware from their PC as well as helping to prevent spyware from installing itself in the future. Some of these removal tools are listed below:

• Lavasoft's Adaware
  Lavasoft offers a FREE version of Adaware that can remove many known spyware threats from your computer. They also offer a version that can be purchased that will protect your computer in real time and prevent spyware from ever being able to install in the first place.
  
  
• PC Tools Spydoctor
  Spyware Doctor is a top-rated malware & spyware removal utility that detects, removes and protects your PC from thousands of potential spyware, adware, trojans, keyloggers, spybots and tracking threats. Protect your privacy and computing habits from prying eyes and virtual trespassers with the help of Spyware Doctor.
  
  
• Microsoft Anti-Spyware Tool (Beta)
  Windows Anti-Spyware (Beta) is a security technology that helps protect Windows users from spyware and other potentially unwanted software. Known spyware on your PC can be detected and removed. This helps reduce negative effects caused by spyware including slow PC performance, annoying pop-up ads, unwanted changes to Internet settings, and unauthorized use of your private information. Continuous protection improves Internet browsing safety by guarding over 50 ways spyware can enter your PC.