Manually download the latest definition updates for Windows Defender

Even all of these security measures in place ,there is still a chance for things to take an ugly turn for the worst. will help to protect against malware infection,malicious downloads,popups,slow performances and a variety of other internet-borne threats. To help avoid virus and malware infection, it is important to take care with all the online activities.Spyware as we all know is a program that is installed on a PC without the  users agreement and is directed at collecting personal/sensitive classified information about a user or the computer. So an anti spyware is a program that blocks malicious programs from fulfilling their intensions and is an anti spyware and is more capable. Many people use anti-spyware in combination so as to add multiple layers of security. But should a conflict resides, it is recommended to use only one solution at a time.

Unwanted software can be installed by websites, downloaded programs, or a program you might install from a CD, DVD, external hard disk, or a device. Spyware is most commonly installed through free software, such as file sharing, screen savers, or search toolbars ,some spyware can be installed from a website through an embedded script, or program in a webpage. Some unwanted software requires your help to install through web pop-ups or free software that require you to accept a downloadable file. However, if you keep Windows up to date and don’t reduce your security settings, you can minimize the chances of a spyware infection. Some websites will repeatedly display pop-ups asking you to install a toolbar or change your home page. When this happens, try closing the browser window. If the pop-ups still appear, right-click the Internet Explorer button in the taskbar at the bottom of your screen, and then click Close Group. As a last resort, close any other programs you have open, and then restart your computer. When you visit websites, do not automatically agree to download anything the site offers. If you download free software, such as file sharing programs or screen savers, read the license agreement carefully. Look for clauses where you must accept advertising and pop-ups from the company, or that the software will send certain information back to the software publisher.

This article describes how to manually download the latest definition updates for Microsoft Windows Defender.To manually download the Windows Defender definitions for your computer, follow the steps for your operating system type, 32-bit version or 64-bit version.

After you click this link, click Run to install the definition file immediately, or click Save to save the definition file to the computer. If you click Save, remember the folder where you save the file. To install the saved definition update file, click Start, click Run, locate the folder where you saved the definition file, double-click the Mpas-fe.exe file, and then click OK. Note To install the file on a Windows Vista-based computer, right-click the file, and then click Run As Administrator to install it. When the definition file runs, a file extraction dialog box appears. The dialog box indicates that the definition update is installing. After the file extraction dialog box closes, you can verify that the Windows Defender definitions have been updated. To do this, open Windows Defender, and then check the definition version that is listed in the box at the bottom of the Windows Defender Home dialog box.

Command-line installations:

The Windows Defender definition update file (Mpas-fe.exe) can use the -q command-line execution switch. This switch installs the definition update in quiet mode. Quiet mode suppresses the definition file extraction dialog box. For example, type the following command:

    • Mpas-fe.exe –q

64-bit versions of Windows :
If you run a 64-bit version of Windows, download the Windows Defender Update Definition file by clicking one of the following links. Note You must be running a 64-bit version of Windows to run a 64-bit version of Windows Defender. 64-bit versions of Windows include x64-based versions and Itanium-based versions. To download the Windows Defender definition update file for x64-based versions of Windows, click the following link:


  1. To download the Windows Defender definition update file for 32-bit (x86-based) versions of Windows, click the following link:
  2. To download the Windows Defender definition update file for x64-based versions of Windows, click the following link:
  3. Windows Defender Latest Definition Updates from softpedia:                                          

Courtesy: ,(KB923159)

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