KB ID 0000159
You have forgotten your password, or the administrators password fo your Windows machine.
Note: You can also ‘Blank’ or reset the DSRM (Directory Services Restore Mode) password on a Domain Controller (Tested on 2012 R2, by blanking the password). Using this method.
Lost Password : Fix
Lost Password Software Download Links
Password Reset CD Image (3.5Mb) Note: This is a .iso file – you need to burn it as an image! Simply dropping this file on a CD will NOT work.
WARNINIG – If your drive has been encrypted with Windows Bitlocker this procedure will not work!