How to fix "A disk read error"

1. Boot from the installation media
2. Click Repair your computer or press R
3. Click Troubleshoot
4. Click Advanced options
5. Click Command Prompt
6. Type the commands and press Enter after each:

   bootrec /rebuildbcd
   bootrec /fixmbr
   bootrec /fixboot

7. Type exit and press Enter to quit Command Prompt
8. Restart the computer