Admin password reset in Windows Server 2012 R2

  1. Start system with Windows Server 2012 R2 media DVD
  2. On Setup Screen click NEXT
  3. Select "REPAIR YOUR COMPUTER" option
  4. On "Choose an option" window: click "TROUBLESHOOT"
  5. On "Advanced options" window: click "COMMMAND PROMPT"
  6. On command prompt type:
cd windowssystem32
ren Utilman.exe Utilman.exe.old
copy cmd.exe Utilman.exe
  1. Click CONTINUE
  2. Startup system with boot disk
  3. On login screen: press windows key + U (popup command prompt)
  4. Type the following comand
net user administrator NewPassword