Windows Defender (aka known Microsoft AntiSpyware) is a Microsoft tool which will analyze the system searching for malicious software in your computer.
It also protects your system in real time, avoiding this kind of software to be installed.
Windows Defender is an easy to use tool which offers an intuitive interface and several options.
Plan analyses eachcertain time, configure the advices and warnings and choose the elements to be analyzed by Windows Defender.
The most interesting setting is the Software Explorer which will show you know the characteristics of the programs being run, included in startup or net applications.
And now you can access a new community of users created by Microsoft which will let you know more about Spyware.