Windows 8 boot failure and Automatic Repair failure because disk is locked

by jasonvonruden 24. April 2013 13:12

For some reason after 5 months of using windows 8 my desktop suddenly out the the blue failed to boot complaining about MBR missing. I decided to see how the windows 8 install disc would handle recreating the hard drives Boot Sector and MBR. 

To my surprise the Automatic Repair feature was no help and it error out complaining about a very weird error that made no sense. 

“The drive where Windows is installed is locked. Unlock the drive and try again.” 


I was surprised that the searching the web was not very helpful.  After a long time I finally found a solution that work.

The Solution that worked for me:

  1. Boot from the Windows 8 Install Disk
  2. Choose Troubleshoot option
  3. Choose Advanced options
  4. Choose Command Prompt
  5. Use dos commands to fix and rebuild Boot Sector and MBR
    • Bootrec /fixmbr
    • Bootrec /fixboot
    • Bootrec /rebuildbcd

Not sure how the average computer user would ever be able to find and fix their computer when presented this error due to all the misleading blog posts and advice for Boot and MBR Issues that are on the web.


Windows 8