unable to Retrieve Default Windows Administrator Password of EC2 instance

Question

When I am trying to retrieve password for one EC2 instance from key pair, I am getting the below error, please help me how to retrieve the password.

Password is not available.
This instance was launched from a custom AMI, or the default password has changed. A password cannot be retrieved for this instance. If you have forgotten your password, you can reset it using the Amazon EC2 configuration service.

Answer 1

You have several options to change the password so that you can regain access to your Windows instance. This third method is now the recommended method - using AWS Systems Manager. Note: AWS Systems Manager can take a bit of time to understand. Once you do, you will have many new powerful commands.

Run a command to change the Windows password. This document will show you how to use Instance User Data. You will want to run a Windows command net user Administrator newpassword. Setup the script and then reboot the instance. The command runs on reboot.

Resetting the Windows Administrator Password Using EC2Launch

Reset Passwords and SSH Keys on Amazon EC2 Instances