Resetting a forgotten Administrator Password for windows server 2008 R2

• Boot onto DVD of Windows Server 2008
• Choose “Repair your computer”
• Launch cmd
• Go to D:\windows\system32 //why D? because the system disk is replaced to D :
• Rename Utilman.exe to Utilman.exe.bak
• Copy cmd.exe to Utilman.exe
• Reboot on Windows
• Do the keyboard shortcut Windows + U when on the logon screen
• net user administrator Newpass123 inside the cmd
• log on with the domain admin account and this new pass
• change the password to remember it if needed
• Reboot on the DVD to put back the original Utilman.exe

I will have to try this on a domain controller to check the repercussions!!!

P.S.
it works on a domain controller! time to think about windows security??