Type in net user name /add making sure to replace “name” with a username of your choice. Press ↵ Enter. Type in net localgroup administrators name /add again replacing “name” with the name of the user you just created. Press ↵ Enter
Skip this step on Windows 7.
If the startup screen has the standard startup options listed, select Start Windows Normally again, then restart it again via the Power button. You’ll need to keep doing this until you arrive at the “Startup Repair” screen.
If the startup screen has the standard startup options listed, select Start Windows Normally again, then restart it again via the Power button. You’ll need to keep doing this until you arrive at the “Startup Repair” screen.
Click File in the top-left corner of Notepad. Click Open. . . in the drop-down menu. Double-click Computer in the window which opens. Double-click your computer’s hard drive (usually C:). Double-click the Windows folder. Scroll down and double-click the System32 folder.
Find the “Utilman” shortcut in the “U” section of files (not folders). Right-click “Utilman”, then click Rename Type in Utilman1, then press ↵ Enter. Find the “cmd” file. Right-click the “cmd” file, then click Copy Press Ctrl+V to paste in the copied file. Right-click the copied file, then click Rename, type in Utilman, and press ↵ Enter.
To do this method, you need Mac OS X 10. 7 Lion or later. To check if you have this, press the Apple Button then About this Mac
You may need a Confirmation to do this, depending on the settings
This boots the Mac into recovery mode, where you can Format the Disk, reinstall MacOS, and change a Password. This may take longer than usual to load. If you boot to an Options screen with the Time Machine, Reinstall, Safari, and Disk Utility Screen, proceed to the next step. If you see the normal screen, repeat the process