Open Malwarebytes
Go to Settings
Select the General tab
Turn off Self-Protection if enabled
Close Malwarebytes
Open Control Panel
Click Programs and Features
Find Malwarebytes in the list
Select Malwarebytes
Click Uninstall
Follow the on-screen prompts
Restart your computer
If needed, use Malwarebytes Support Tool to remove remaining components
If needed, uninstall Malwarebytes from Windows Settings > Apps > Installed apps
If needed, delete leftover Malwarebytes folders from Program Files and AppData