5.9.2.3

What is a common cause of the error message 'OS Not Found' when booting a computer?

• The MBR is damaged or corrupt

• The BIOS/UEFI is configured to boot from the wrong hard disk

• The disk doesn't have an operating system installed

• The optical drive is malfunctioning

What should you do if the error message 'OS Not Found' displays when an operating system can't be found on an optical disc?

• Format the entire hard drive

• Install a new operating system

• Replace the optical drive with a new one

• Remove the optical disc from the drive and reboot

What is the master boot record (MBR) and why is it important for the operating system to load?

• It is a backup of the operating system

• It is a software that manages the hard drive

• It is a hardware component that stores the operating system

• It is the first sector of the hard drive that tells the BIOS where to look for the operating system

How can you fix a damaged or corrupt MBR in Windows?

• Replace the hard drive with a new one

• Reinstall the operating system

• Run the bootrec command with the /fixmbr switch

• Boot from the installation disc and select the Automatic repair option

What does the bootrec command with the /rebuildbcd switch do?

• Rebuilds the boot configuration data

• Repairs the master boot record

• Reinstalls the operating system

• Repairs the boot sector