Defender can't be disabled

Since February update, Tamper Protection and other security features have been improved in Windows, thus it made harder to disable Defender even with TrustedInstaller. On newer Windows builds old versions of Revision Tool tried to completely disable Defender without checking if Tamper Protection was on and it has caused blank Defender app screen issues. Fortunately, newer versions ask users to disable it to avoid the issue, but some users still experience the same issue after upgrading ReviOS.

Solution 1

• 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 2

• Disable UAC in Revision Tool
• Open Terminal as administrator and enter %windir%\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

caution

If it isn't C:\ for you, look up for your drive by searching revi-defender.reg

• set Key Name to revi

danger

It must be set 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...
• Restart and check if Defender is still enabled using Revision Tool