1. Make sure that your second hard drive is attached. Before you can determine which hard drive is the "Master" and which is the "Slave", you'll ne...

2. Open Start {"smallUrl":"https:\/\/www.wikihow.com\/images\/0\/07\/Windowsstart.png","bigUrl":"\/images\/thumb\/0\/07\/Windowsstart.png\/30px-Win...

3. Click Power {"smallUrl":"https:\/\/www.wikihow.com\/images\/5\/5d\/Windowspower.png","bigUrl":"\/images\/thumb\/5\/5d\/Windowspower.png\/30px-Wi...

4. Click Restart. This option is at the top of the pop-up menu. Your computer will begin to restart.

5. Begin repeatedly tapping the BIOS key. The BIOS key varies from computer to computer, but is usually one of the "F" keys (e.g., F2), the Delete...

6. Enter the password if prompted. Once you reach the BIOS, you may be asked to enter a password if you set one previously. If so, type in the pass...

7. Find the list of hard drives. At the top of the BIOS screen, there should be several tabs. You can navigate through these tabs by using the arro...

8. Select the computer's built-in hard drive. This will most likely be the top hard drive in the list, though you should confirm by looking at the...

9. Change the hard drive to "Master" status. With the hard drive selected, press the "Configure" or "Change" key (usually ↵ Enter) as listed in the...

10. Select the second hard drive. Using the arrow keys, find and select the hard drive that you attached to the computer.