Windows Defender is software that
helps protect your computer against
pop-ups,slow performance,and
security threats caused by spyware and
other unwanted software by detecting
and removing known spyware from your
computer. Windows Defender features
Real-Time Protection,a monitoring
system that recommends actions against
spyware when it’s detected,minimizes
interruptions,and helps you stay
productive.

主要特点：

>间谍软件检测和删除
>提高互联网浏览安全性
>防范最新威胁(MS研究人员和自愿的全球网络收集有关安全线程的信息

您可以使用Malicious Software Removal Tool(mrt.exe)扫描已经感染计算机的恶意软件.

The Microsoft Windows MalicIoUs Software Removal Tool checks computers running Windows Vista,Windows XP,Windows 2000,and Windows Server 2003 for infections by specific,prevalent malicIoUs software—including Blaster,Sasser,and Mydoom—and helps remove any infection found. When the detection and removal process is complete,the tool displays a report describing the outcome,including which,if any,malicIoUs software was detected and removed.