How to Fix a Disc Boot Failure on a Computer

1. Turn off your computer by pressing and holding the power button until the computer shuts down.

2. Locate the boot disc for your operating system (OS).

3. Turn on your computer and insert the CD into the proper drive before your monitor reaches the BIOS screen. If the computer cannot read the CD, eject it and wipe the readable side of the disc with a clean cloth. Restart your computer and re-insert the CD. If this does not begin to load your operating system, go to Step 4.

4. Restart your computer and press the “DEL” key when you reach the BIOS screen. This will bring you to BIOS settings. Make sure that your hard drive is enabled to be read by BIOS. Restart your computer.

5. Access the command prompt by pressing the “F8” button at the appropriate moment. Your monitor will display a notification at the bottom of the screen when you can access the system options with 'F8.' From the menu that appears, select the “Command Prompt” option.

6. Enter the text “fdisk /mbr”. On the next line, enter “sys c:” and press “Enter.” This will initiate a system restore of corrupted discs. If this does not clear the disc boot error problem, go to Step 7.

7. Turn off your computer and remove the power supply.

8. Remove the side panel from your hard drive tower by hand or with a screwdriver.

9. Locate the hard drive of your computer in the top-front section of the hard drive tower when viewed from the side. Using your fingertips, make sure all connections to and from your hard drive component are secure.

10. Locate the BIOS battery, which is a circular battery found on the motherboard. Make sure that all connections to and from the BIOS battery are secure.

11. Check the connection of your computer’s RAM to your motherboard.