Because the site needs to be more than 30 virtual machines on the password change. Modify the normal way to go to Control Panel - User Accounts - Change Password, enter the original password, the new password 2 times (once for password confirmation) complete the password change.
In this way the operation is more complicated, we can directly modify the password by way of command.
For example, I need to modify the administrator password for the user qaz @ 123 , execute the following command after you log on to the server directly in cmd:
net user administrator gas @ 123
Where the administrator for the user name, qaz @ 123 is modified password.