How to manually update Windows Defender in Windows 11/10

Windows Defender On Windows 11, Windows 10, or Windows 8.1 to automatically download and install definition updates using Windows Update once per day. If for some reason Windows Defender does not update automatically, or if you want to download and save definition updates to finally update Windows Defender offline, on different installations of Windows 11/10/8/7/Vista, this post will raise your interest.

We have already seen how to download Windows Update manually. Today we will see how you can update Windows Defender manually in Windows 11. Windows 10, Windows 8.1 and Windows 7. I will also provide links to download Windows Defender updates in the post.

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How to manually update Windows Defender

First check if you are using 32-bit or 64-bit version of Windows 11/10/8.1/7. Once you know which version of Windows is installed on your device, download the installers from the following links:

• Download definition updates for Windows Defender in Windows 11, Windows 10, and Windows 8.1/8: 32 bit | 64 bit | arms.
• Download definition updates for Windows Defender in Windows 7 and Windows Vista: 32 bit | 64 bit.
• Download definition updates for Microsoft Security Essentials: 32 bit | 64 bit.

Once the file has finished downloading, go to your download location and double-click on the file Mapam–an act.exe. Follow the prompts to install the update.

You can also update Windows Defender definitions using Windows PowerShell.

If you suspect that some malware is preventing Windows Defender definition updates from being installed, you can run a scan with the Microsoft Safety Scanner or, for more stubborn malware, use Windows Defender Offline.

Point: Learn how to update Windows offline.

These links will also be of interest to you:

1. Update Windows Defender even if automatic Windows updates are disabled
2. Windows Defender is disabled or not working
3. Windows Defender could not be activated.