Microsoft Windows Defender is free anti-spyware and adware software free to be downloaded for Windows XP SP2 and inbuilt with Windows Vista. Windows Defender is easy to install and configure and once this program has been installed in your computer will help you avoid/eliminate pop-ups and security threats provoked by malicious software. This program gives its users the option of choosing a low, medium or high level of security and to add to its utility this is the only antispyware program which by default does regular scheduled scan.

Installing this software in your computer requires not more than 5.50MB space, this space will be used by the program for free updates and virus definitions which are provided by Microsoft. Though this program presents itself as free anti-spyware software but when tested against known spywares this program didn’t perform well. Similarly in the case of adware this program did an excellent job of detecting and removing majority of threats.

This program is user-friendly and does a good job when it comes to protecting computers and using this program is not at all difficult for the consumers. If you have any problem using this program you can refer the help menu as it is very helpful for new bee as well as the more professional ones.