How to manually download the latest definition updates for Windows Defender:http://go.microsoft.com/fwlink/?LinkID=87584&clcid=0x409
Windows Defender Latest Definition Updates from softpedia: http://www.softpedia.com/progDownload/Windows-Defender-Latest-Definition-Updates-Download-104685.html
WGA enforcement – There are significant risks to running non-genuine Windows. Only genuine Windows customers can receive product downloads, Windows updates and special offers. Windows Defender will validate that your copy of Windows is genuine before installation. Furthermore, Windows Defender will only remove Severe threats for machines that are not genuine. Low, Medium and High threats will be detected, but not removed unless your copy of Windows is genuine.For more information, please visit The Windows Genuine Advantage.Windows Defender no longer supports Windows 2000 as it went out of mainstream support in June 2005.
Download Windows Defender, install it on your Windows XP or Microsoft Windows Server 2003 computer, and configure your basic program settings. You can check your system requirements before you begin. If you are using Windows Vista, you already have Windows Defender.
How to scan your computer for spyware
After you have installed and set up Windows Defender, it’s time to run your first spyware scan. Windows Defender will identify programs that seem suspicious and give you the option to delete them, quarantine them, or leave them alone. (Screenshot-scanning).Fake security softwares prevalent lately Learn how to protect yourself from these new threats.
If you believe that Windows Defender has mistaken your program for another program, fill out and submit this False Positive Report form. For the fastest response, please submit your request in English.
How to upgrade to Windows Defender
Find out if you need to upgrade to Windows Defender to help keep spyware and other unwanted software out of your computer. Download the latest version if you don’t have it already.
Install the latest Microsoft Forefront Security definition updates:
Install the latest Windows Defender definition updates for computers running x32-based version of Windows.How to manually download the latest definition updates for Windows Defender, to know please click here.If you encounter problems while trying to install definition updates for Windows Defender, you can download the latest Windows Defender definition updates for computers running a 32-bit (x86-based) version of Windows.Instructions for a 64-bit system can be found here. Alternatively you can download Windows Defender Latest Definition Updates from softpedia: Link . Before downloading from this link please read this .Link
Step 1: Save or run the file.
After you download the latest definition updates, click Run to install the definition file immediately, or click Save to save it to your computer. If you click Save, remember the name of the folder where you save the file.
Step 2: Install the definition update.
To install the saved definition update file:
If your computer is running Windows Vista or Windows 7, 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.
For more information on how to manually download the latest definition updates for Windows Defender, review the Knowledge Base article: How to manually download the latest definition updates for Windows Defender.