When the Windows Including Windows Server Password and UserName is Lost and Can't Remember its a big frustration , especially to reinstall and re-Instate the Data and other Application installations, Most Cases you end up in Data loses and Time Consuming. Insert the Installation Media- and Boot from the Media Select Option - Repair Select Option: Trousleshoot Select The Option : Command Line Prompt Change Directory- and Usually d: Copy and Replace the Windows System32 File in the comman Line. Continue with the process by exiting the command prompt and Select Continue Re-start the Windows and hit the Shit Key 5 -times or more or Windows Key + U to get you to the Administrative Command Prompt where you can change the Password and User Name at will.