Windows Defender Antispyware Definition Updates is the Definition Updates for Windows Defender (Beta 2), Windows Defender is a security technology that helps protect Windows you from spyware and other potentially unwanted software. Using Microsoft Windows Defender, known spyware on your system will be detected and removed.

This helps reduce negative effects caused by spyware, including slow computer performance, annoying pop-up ads, unwanted changes to Internet settings, and unauthorized use of your private information.

This enhanced protection improves Internet browsing safety by helping to guard the places where spyware can enter your computer.

Windows Defender (Beta 2) is the name of the next beta version of Microsoft Windows AntiSpyware. It includes several enhancements that are based on customer input.

To install the saved definition update file:

- If your computer is running Windows Vista, click Start, click Documents, and then locate the folder where you saved the definition file. Right-click Mpas-fe.exe, click Run as administrator, and then click Run. When you are prompted for an administrator password or confirmation, type the password or provide confirmation, and then wait while the definition files are installed.

- If your computer is running any other Windows operating system, you must be logged on as an administrator to install the latest definition file. Browse to the folder where you saved the file, and then double-click Mpas-fe.exe to install the latest definition file.

Note: If you do not have an administrator account on the computer, ask an administrator to log on and install the definitions file for you.

The license of this software is Update, you can free download and free use this antivirus update software.