Spyware has the capability to penetrate, record and send off your personal information kept and keyed into your computer. Credit card numbers, social security numbers, passwords and more can be tracked by spyware applications who then sell it to advertising companies or individual intruders use it for identity theft.

Most spyware will run silently on your computer, leaving you no signs of the information being transferred out. While anti-virus tools are important to use, external software is necessary to catch spyware because virus programs are not designed to detect spyware files.

Downloading freeware such as music and game programs will install spyware in your computer almost certainly. The information gathered by spyware is most often sold to companies who will then use it for advertising purposes. They will target you with product ads they feel you would purchase based on the information spyware gathered.

Running one or more spyware tools on a regular basis and keeping them updated is the primary way to guard you from spyware infections. No Adware and X-Block are two recommended spyware scanning tools. Each can run through the computer system and detect spyware infected files needing to be erased.