How to Reset Password on Windows Server 2008, Windows Server 2008 R2, Windows Server 2012

Follow the given steps to "Reset the local and domain administrator password on Windows Server 2008/2012" with just the Windows Installation Disk

1) Insert the original Windows Server 2008/2012 installation DVD
2) Boot your computer from Windows Server 2008/2012 Installation DVD
3) Choose option "Repair your computer" ( Note down the Drive letter which is showing next to Windows Server 2008 R2 under System Recovery Options mode) and then Click NEXT

4) Start Command Prompt

5) Enter D: { The Driver Letter which is showing in the 1st screenshot)

6) Type CD Windows\System32 and hit Enter

7)Type MOVE Utilman.exe Utilman.exe.bak and then hit Enter

8) Type COPY Cmd.exe Utilman.exe and hit Enter

9) You may also need to "Enable" the administrator account which can be done by using "NET USER administrator /active:yes"

* Restart windows

* At the login screen, Enter "Windows + U" Key, this will prompt cmd.exe on your screen. Then after type  NET USER administrator * and hit Enter

 It will ask for new password, type the password there.

Now  Login as administrator with the new password. 

You are just 1 step away from completing the procedure. Follow the given steps below to move the original Utilman.exe back to its location

a) Reboot your computer from DVD and follow the above same steps (3 - 6)
b) Type MOVE Utilman.exe.bak  Utilman.exe and hit Enter.It will prompt for  Overwriting existing file--> Click "YES"

Now, Restart your machine and ENJOY..!!