If you select a nondefault keyboard device during the installation of Server Core for Windows 2012 R2, you can use the keyboard during the installation process. However, after the Setup program is completed, you cannot select a keyboard, and the default keyboard is used instead. Therefore, you cannot enter the correct characters for your password because the default keyboard layout differs from the layout of your selected keyboard.
Additionally, you receive the following error message during the logon process:
The password is incorrect. Try again