By booting with CD/DVD or a USB flash drive, we can do many system settings, such a system repair, system restore, system reinstallation, and even windows password reset.

Here are more details about how to reset windows password by booting from CD/DVD or a USB flash drive.

1. Download and install Rekeysoft Windows Password Recovery.

2. Burn a bootable disk with the ISO image file in program package.

3. Eject the produced CD/DVD and insert it in the locked computer.

4. Reboot the locked PC (it's required for you to change the locked PC's BIOS setting to make it boot from CD drive), and then follow windows password reset guidelines.

5. Now login Windows with blank password.

Besides booting from a peripheral device in BIOS, you also can set passwords in it, such as supervisor password for securing access to the BIOS interface and preventing malicious users from booting the system from unauthorized peripheral devices.

Note: To protect a computer's configuration, a computer must have its BIOS password-protected and set its hard disk as the first boot device (default).

Procedures for setting supervisor password:

1. Power on computer.

2. Press F2 or other keys to login BIOS screen.

3. Select Security tab with arrow keys, choose Set Supervisor Password and press Enter key.

4. Input password and confirm password as the wizard.

5. Save all changes and logout BIOS screen by pressing F10 key.

The BIOS interface may be different based on motherboards, you may find Password tab instead of Security tab.

In this way, no one can access your BIOS to change system setup without correct password, including windows password reset.