#1. Create a script with the following net user command
net user “Administrator” %1
The %1 allows you to pass a parameter to the script (ie the password) so you don’t store it in a file on the server.
#2 Create a GPO and add the following script to the start up script in the computer section. You can disable the User configuration if that is all you are doing. When adding the startup script, make sure to enter the new password as the parameter to the script.
#3 Create an OU and apply the GPO and any others needed to the OU.
#4. Add a test computer to the new OU and reboot the test computer.
#5 Test that you can login with the new password.