Changing the administrator password in Windows 10 using CMD from a guest account can be a useful skill to have, especially in situations where you need to access admin privileges. Here's a step-by-step guide to help you achieve this:

1. Open the Command Prompt:

Press Windows Key + X and select 'Command Prompt (Admin)' to run CMD with administrative privileges.

2. Access the Administrator Account:

Type 'net user administrator /active:yes' and press Enter to activate the administrator account.

3. Change the Administrator Password:

Still in CMD, type 'net user administrator *' and press Enter. You'll be prompted to enter a new password for the administrator account. Type the new password and press Enter. You may need to confirm the new password.

4. Disable the Administrator Account:

Type 'net user administrator /active:no' to deactivate the administrator account for security reasons.

5. Log in with the New Administrator Password:

You can now log in to the administrator account using the new password you set.

Remember to keep your administrator password secure and avoid sharing it with unauthorized users to protect your system's security.