The Windows 10 May 2019 Update contains a new tamper protection feature, also known as Windows Defender Antivirus. Tamper Protection is off by default and Windows Security says «your device may be vulnerable» if you don’t turn it on.

What is Tamper Protection in Windows 10?

Windows Security recommends tamper protection.

According to Microsoft, Tamper Protection «helps prevent critical Defender antivirus protection settings, including real-time protection and protection in the cloud, from being modified by malicious applications.» In other words, it is more difficult for malware running on your computer to disable real antivirus protection and other features.

You can still configure the settings yourself using the Windows Security app. In fact, once you enable Tamper Protection, you shouldn’t notice anything else. That’s why we recommend enabling it.

Note that tamper protection only applies to Windows security settings. If you are using a third party antivirus, it will not protect the settings of that antivirus. Some third-party antivirus programs have similar built-in «tamper protection» features to protect their settings.

Protected options include real-time protection, cloud-based protection, IOfficeAntivirus (IOAV), behavior monitoring, and removal of security updates. Applications cannot change these settings using mobile device management and other enterprise solutions, command-line options, group policy, the Windows registry, and various other security-enabled methods.

How to enable tamper protection

This setting is included in the Windows Security app. To open it, search the Start menu for Windows Security and click the Windows Security shortcut, double-click the Windows Security Shield icon in the notification area (taskbar), or go to Settings > Update & Security > » Windows Security» > «Open». Windows security.

Windows Security Shortcut in the Start Menu

You may be prompted to enable tamper protection. You can just click «Enable» to turn it on.

If not, click the Virus & Threat Protection icon in the shape of a shield.

Security Center at a glance

Click the Manage Settings link under Virus & Threat Protection Settings.

Manage settings link for antivirus and threat protection settings

Locate the tamper protection setting and click the switch to set it to Off. And «On».

If you want to disable Tamper Protection in the future — we’re not sure why, but it might be causing some issue — you can disable it from here.

Ability to enable tamper protection in Windows 10

This setting can also be enabled through the registry. It is located under the following key:

  HKEY_LOCAL_MACHINE \ ПРОГРАММНОЕ ОБЕСПЕЧЕНИЕ \ Microsoft \ Защитник Windows \ Функции 

TamperProtection here is a DWORD value. Set to «0» to disable tamper protection, or «5» to enable tamper protection.

Configuring tamper protection in the Windows registry

We recommend enabling this option on all your Windows 10 PCs. A business managing a fleet of PCs with enterprise software tools will want to disable it, which is why these management tools work, but that’s the only reason we can see it disabled.

RELATED: Everything new in the Windows 10 May 2019 Update

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