How To Repair MBR (Master Boot Record) Partition In Windows

These steps apply to any legacy drive used as a boot drive on any recent Windows Operating system.

1. Use the F12 key at the Dell Splash screen to enter the boot menu. It lets you boot from the Windows installation media or a bootable disc or flash drive.

2. Click on the Repair your Computer link at the bottom of the Install Now screen.

3. Click on Troubleshoot

4. Select Command Prompt

5. Enter the following three commands in turn, following each by pressing the Enter key:

   bootrec /fixmbr

   bootrec /fixboot

   bootrec /rebuildbcd

6. Restart the PC with the installation media removed to check if the repair worked

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