How to Access Administrator in a Macbook

Click the 'Apple' icon in the upper-left corner of the screen and select 'System Preferences.' Click the 'Accounts' icon.
Look at the list of accounts on the left side of the window. Under the name of an account is the privilege level of the account. These can be 'Admin,' 'Standard' or 'Sharing Only.' If 'My Account' is listed as an 'Admin' account, you are currently logged in as an administrator. If it is not, proceed to the next step.
Click the 'Apple' icon and select 'Log Out.' Confirm that you want to quit all applications and log out in the pop-up window. Once logout is complete, the login window displays on the screen.
Click on a user account with administrator privileges and enter the password. Press return to access the administrator account.
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How to Reinstall a MacBook (10 Steps)

Back up all your data to removable storage, such as an external hard drive, CDs or DVDs.
Insert the Mac OS X Install DVD that comes with your MacBook. Double-click on 'Install Mac OS X' when the window opens. Click on the blue 'Restart' button when the next 'Install Mac OS X' window opens, indicating that your computer will begin the installation process.
Enter the administrator level user name and password when the 'Install Mac OS X requires that you type your password' dialog box opens. Click 'OK.'
Select your language preference from the list when the MacBook restarts. Click on the blue forward arrow button to continue.
Note the 'Leopard Installer' window that opens. To install Mac OS X, click continue. Agree to the terms of service on the license agreement, and then click continue.
Select a destination for Mac OS X by clicking on the icon of the hard drive.
Click on the 'Options' button and choose an option for installation. Select 'Archive and Install' if you wish to install a new version of OS X but leave your old system files and move them to a new folder called 'Previous System.' This will allow you to recover your files if you change your mind.
Choose 'Preserve User and Network Settings' if you wish to save your user accounts and home folders.
Select the 'Erase and Install' option to permanently wipe your hard drive clean of all data, system files and folders. Click 'OK' and continue. Installation will begin and your computer will restart when completed.
Reinstall any data you have lost by inserting your backup data disks or reinstalling from the external hard drive.
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How to Turn Off MacBook Keyboard Lights (3 Steps)

Locate the 'F5' button, which can be found in the top row of your MacBook's keyboard.
Press the 'F5' button to lower the lighting level of the keyboard back light. When pressed, the light-level indicator will appear on the screen, displaying the level at which the back light is presently set. Each time the 'F5' button is pressed, the back light will drop one level.
Press the 'F5' button until the back light is off and there are no blocks remaining in the light-level indicator on the screen.
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