There are many types of antispyware programs you can buy or download to help you remove or prevent spyware or malware infections on your computer. Some free and some you need to pay for and some do a better job than others. Microsoft realized they needed to get in the antispyware game since most of the spyware out there is created to attack their Windows operating system. So they came out with their own antispyware program called Windows Defender.
Windows Defender 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 more than 50 ways spyware can enter your PC. Participants in the worldwide SpyNet™ community play a key role in determining which suspicious programs are classified as spyware. Microsoft researchers quickly develop methods to counteract these threats, and updates are automatically downloaded to your PC so you stay up to date.
This software is free to licensed Windows users and comes included with Windows Vista and Windows 7. Click here for more information and to download the software.