As Microsoft Defender antivirus automatically turns itself off when it detects another antivirus program, we are removing a legacy registry setting called DisableAntiSpyware. This feature protects devices from cyber attacks that try to disable built-security solutions, such as antivirus protection, in an attempt to gain access to your data, to install malware, or to otherwise exploit your data, identity, and devices. Microsoft Defender Antivirus tamper protection is turned on by default for all consumer Windows 10 devices. You must be signed in as an administrator to turn on or off Tamper Protection. This tutorial will show you how to turn on or off Tamper Protection for key Microsoft Defender Antivirus security features in Windows 10.

Tamper protection now generally available for Microsoft Defender ATP customers | Microsoft Tech Community.

Prevent changes to security settings with Tamper Protection | Windows Security Support.

Protect security settings with Tamper Protection | Microsoft Docs.

Starting with Windows 10 build 18323, you may see a new recommendation in the Windows Security app suggesting you turn this setting on if currently turned off. Tamper Protection is a new setting from Microsoft Defender Antivirus, available in the Windows Security app, which when on, provides additional protections against changes to key security features, including limiting changes which are not made directly through the Windows Security app. Starting with Windows 10 build 18305, Microsoft introduced Tamper Protection. In addition to this real-time protection, updates are downloaded automatically to help keep your device safe and protect it from threats. Windows Security continually scans for malware (malicious software), viruses, and security threats. Your device will be actively protected from the moment you start Windows 10.

Windows 10 includes Windows Security, which provides the latest antivirus protection. Starting with Windows 10 version 2004, Windows Defender Antivirus as been renamed to Microsoft Defender Antivirus. How to Turn On or Off Tamper Protection for Microsoft Defender Antivirus in Windows 10

Turn off windows defender windows 7