Once boot protection is installed, the computer prompts the user for the password each time the operating system is loaded. The operating system will not boot without the correct password.
Boot protection works even after the software has been uninstalled, and when the drive is connected to another computer.
In stealth mode, the computer doesn't display the password entry screen and doesn't show the keyboard input on-screen.
It will look as if the computer is frozen. But if the correct password is entered and the Enter key hit, the operating system will boot.
You can set a password hint to ensure you don't forget your password. The software will display the hint when you deactivate protection.