Reset Administrator's password in Windows Server 2012 R2 (forgot password) 1. Prepare - DC11 : Running Windows Server 2012 R2 - a DVD install OS Windows Server 2012 R2 2. Step by step : Reset Administrator's password (forgot password) - Insert DVD to server - DC11 : Reset Administrator's password + You forgot password and logon fail + Boot to DVD - Next - Repair your computer - Troubleshoot - Command Prompt, type : + X:\Sources D: # Maybe C: + D:\Dir # Check folders + D:\cd Windows + D:\Windows\cd System32 + D:\Windows\System32\ ren + D:\Windows\System32\ copy + D:\Windows\System32\ Shutdown -r -t 0 # Restart + Click 'Ease of access' + C:\Windows\System32\ net user Administrator abc@123 # Set new password is abc@123 + Logon using new password === OK --------------------------------------------******************** ********************----------------------------------------