Easily Update Windows Defender Antivirus on Windows 10/11

Keeping Windows Defender anti-virus software updated is the key to ensuring it detects the latest threats. This article will introduce several ways to update Windows Defender anti-virus software on Windows 10/11 systems.

What is Windows Defender Anti-Virus Software?

Windows Defender Anti-Virus Software is a built-in anti-virus application for Windows that helps protect your computer from viruses, malware, spyware, and more. If you don't want to install third-party anti-virus software, using Windows Defender alone is also enough to protect your computer.

To better protect your Windows 10/11 computer, Microsoft continues to release Windows Defender updates to cope with the latest threats and adjust detection logic, thereby enhancing the functionality of Microsoft Defender anti-virus software. Therefore, it is best to make sure you are using the latest version of Windows Defender Anti-Virus software. Normally, your system can automatically get updates to Windows Defender. However, you can also perform Windows Defender updates manually.

This article will show you the methods you can use to perform security intelligent updates of Microsoft Defender Antivirus Software.

How to update Windows Defender anti-virus software?

Method 1: Automatically update Windows Defender

Microsoft releases updates to Windows Defender through Windows Update. You can visit Windows Update and click "Check for Updates" to see if there are any Windows Defender updates available. This update is usually titled "Security Intelligent Update for Microsoft Defender Anti-Virus Software".

If Windows Update doesn't work, you can run the Windows Update troubleshooter to fix it. To get Windows Defender Anti-Virus software to work properly, you need to make sure it is enabled on your device.

Method 2: Trigger Windows Defender update through CMD

You can also manually trigger updates to download and apply the latest security intelligence. This method is also your choice if there is a problem with automatic updates via Windows Update.

To manually update Windows Defender, you need to clear the current cache first and then trigger the update. The specific operations are as follows:

Step 1: Run the command prompt as administrator.

Step 2: Run the following commands and click Enter after each command:

• cd %ProgramFiles%\\Windows Defender
• MpCmdRun.exe -removedefinitions -dynamicsignatures
• MpCmdRun.exe -SignatureUpdate

Tip: Enterprise administrators can push Windows Defender updates on their network to the device.

Method 3: Manually download Windows Defender updates

Microsoft provides Windows Defender anti-virus software download source for Windows 10. Windows Defender's security smart update package is signed with SHA2. Therefore, you need to make sure that the necessary updates are installed to support SHA2 signatures, see 2019 SHA-2 Code Signing Support Requirements for Windows and WSUS.

Here is a download link from Microsoft. You can download one based on the version of Windows you are using:

Microsoft Defender Anti-Virus Software for Windows 10 (and Windows 8.1) 32-bit | 64-bit | ARM

Additionally, Microsoft has launched a preview version of Windows Defender in the Microsoft Store. If you want to experience it, you can download it through the Microsoft Store.

How to update Windows security signature?

Step 1: Click the search icon on the taskbar to search for "Windows Security".

Step 2: Select Windows Security to open it.

Step 3: Click "Virus and Threat Protection".

Step 4: Click "Protection Update" under "Virus and Threat Protection Update".

Step 5: Click the "Check for updates" button.

The above is how to update Windows Defender on Windows 10/11 computers. You can choose the right method according to your situation.

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