Change Local Administrator Account Passwords Automatically

How to Use the Tool
How you launch the Set-LocalPassword tool depends on your Windows OSs and whether you have many or only a few computers. To use the Set-LocalPassword tool on a Windows 2003 or XP system that has many computers, log on to the domain using an account that has workstation administration rights, open a command-shell window, and enter the command to run the tool. For example, suppose your input file is C:\ computers.txt, the workstation administrator accounts are all named admin, and you want to set the account passwords to tw1nkl3. On a Windows 2003 or XP system, you'd execute the command

Set-LocalPassword
 admin < computers.txt 

Set-LocalPassword will prompt you to enter and confirm the new password, then begin changing the passwords. When a password change succeeds, the output shows the machine name followed by the word SUCCESS. If you have a noncatastrophic failure, the script displays the machine name followed by the word FAILURE and a brief description of the cause. If you don't want to display the success messages, you can suppress them with the /Q switch to display only the machines that couldn't be updated and the possible reasons for the failures. . . .