Defender can't be disabled

Since February 2023 updates, Tamper Protection and other security features have been improved in Windows, thus it made harder to disable Defender even with TrustedInstaller. Here are some solutions to disable Defender:

Solution 1

• Open Terminal (PowerShell) as administrator and enter:

& "$env:ProgramFiles\Revision Tool\revitool.exe" tweaks security defender enable --force

• Restart your PC
• Open Terminal (PowerShell) as administrator again and enter:

& "$env:ProgramFiles\Revision Tool\revitool.exe" tweaks security defender disable --force

• Restart and verify that Defender is disabled via Revision Tool

Solution 2

• Press Win + R on your keyboard and enter msconfig
• Go to the Boot tab
• In the Boot options section, enable Safe boot
• Apply & OK and restart

Once your system boots in Safe mode, merely open Revision Tool, go to Security and simple disable Defender. Once finished, disable Safe boot following the same way as the enabling process to boot in normal mode.

Solution 3

• Open Terminal (PowerShell) as administrator and enter:

& "$env:systemroot\system32\reagentc.exe" /enable

• Download this file and move it to the C:\ partition
• Press Win + R on your keyboard and enter ms-settings:recovery
• Select Restart now from Advanced startup:

• Go to Troubleshoot → Advanced options → Command Prompt, wait a couple of seconds
• Select your account and press Continue even if you don't have a password

Once a command prompt shows up, enter regedit and select HKEY_LOCAL_MACHINE just like here:

• Then click on the File tab and Load Hive...

• Go to C:\Windows\System32\config and select SYSTEM

• set Key Name to revi

• Click on the File tab again and select Import..., choose revi-defender.reg from your Windows drive and click OK
• Select HKEY_LOCAL_MACHINE\revi, click on the File tab and press Unload Hive..., then close the Registry Editor
• Restart
• Open Terminal (PowerShell) as administrator and enter:

& "${env:ProgramFiles}\Revision Tool\revitool.exe" tweaks security defender disable --force

• Restart and verify that Defender is disabled via Revision Tool