Available article translations:

Unmountable boot volume BSOD when you start Windows virtual machine

  • Parallels Desktop 9 for Mac Standard Edition


When you start Windows it goes to Blue screen error message:



The partition table on the boot drive is broken


  1. Stop the virtual machine that has issue (VM1), create a back up copy of it.

  2. Use the Windows installation CD/DVD to create a new virtual machine (VM2)

    Parallels Desktop menu -> File -> New….

  3. Once the VM2 has been created and Parallels Tools are installed, shut it down.

  4. Go to Configuration of the VM2 -> Hardware -> Add the Hard drive of the VM1 to the list of devices of VM2

  5. Start the VM2

  6. Wait till the drivers for the new SATA drive are installed

  7. Go to Disk management (diskmgmt.msc), verify that the second hard drive is there,

    Go to Start -> Computer , click on the second hard drive – it will (most probably) give you a warning “the disk is not formatted…”.

    NOTE: Do not format it!

  8. Go to and download TestDisk utility

  9. Unzip the archive of TestDisk to the Windows Desktop, run its executable file and follow step-by-step instructions from

  10. After you are done with TestDisk, reboot VM2 and check if the second hard drive is OK now (you can access it and see the file structure)

    If it is OK:

  11. Shut down VM2,

  12. Start VM 1 to make sure it can successfully boot and load Windows.

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