Download the latest free virus definition files and update Defender antivirus

Windows Defender Definitions (64-bit)

Join our mailing list

Stay up to date with latest software releases, news, software discounts, deals and more.

Subscribe
Download Windows Defender Definitions (64-bit)

  -  146 MB  -  Freeware
  • Latest Version:

    Windows Defender Definitions (64-bit) LATEST

  • Requirements:

    Windows 8 (64-bit) / Windows 10 (64-bit)

  • User Rating:

    Click to vote
  • Author / Product:

    Microsoft Corporation / Windows Defender Definitions (64-bit)

  • Old Versions:

  • Filename:

    mpam-fe.exe

  • Details:

    Windows Defender Definitions (64-bit) 2021 full offline installer setup for PC

Windows Defender Definition Updates 64bit is a crucial security addon that enables the core antivirus service running on all modern versions of Windows OS to get access to the latest antivirus definition and gain the ability to detect, quarantine, and erase a wide array of software threats on desktop and laptop PCs.

While the built-in Windows Defender relies heavily on the Microsoft Windows Update service to deliver the latest add-ons, upgrades, and definition archives, many Windows users do not have PCs that are connected to the internet. But such machines are not safe from malicious software threats which can affect them any time such PCs come in content with external storage mediums such as CDs, DVDs, and flash storage drives.

If the local antivirus software is not keeping up with the ever-evolving security solutions, it can fail to detect an untold amount of malware applications that can cause a wide array of issues, including lost files, ransoming of complete local storage content (ransomware), crashes, loss of app stability, spying and data collection, loss of hardware performance, destruction of hardware, OS crashing, inability to boot OS or even total loss of hard drive data.

Windows Defender Definition Updates can prepare modern Windows OS releases (ranging from Windows 7 to Windows 10) to instantly detect any malicious file. Users are recommended to always keep their Definition addons current, even if that means regular downloading and installing update files manually.

For PCs that are connected to the internet, this procedure is done automatically by background Windows services, but users are recommended to check from time to time if the updates have arrived. If the PC is having issues automatically retrieving the latest malware definition updates, then manual downloading of Windows Defender Definition Updates files is needed.

Windows Defender Definitions 64 bit is distributed in 32-bit and 64-bit forms, and users must correctly pick which version of the file they can install on their PC. The entire procedure of getting this security addon installed on the PC is automated and lasts just a few seconds.

Join our mailing list

Stay up to date with latest software releases, news, software discounts, deals and more.

Subscribe