Step 1: Log in to Your VPS Control Panel.
Step 2 : Open Control Panel.

Step 3 : Click on "User Accounts".
Step 4 : Choose the user you would like to change (Administrator).

Step 5 : Click on "Change the password".

Step 6 : After that enter your Current password, New Password and confirm your new password.

Method 2: Change password using Command Prompt
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Log in to the VPS
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Open Command Prompt as Administrator
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Run this following command: net user Administrator NewPasswordHere
Password will be updated instantly.
