Error: Bootmgr is missing when starting the computer.

The Bootmgr is missing error can be caused by corrupt files, corrupt hard drive sectors or hard drive failure, operating system upgrade issues, BIOS settings, or by damaged or loose hard drive cables. You might also see this error if the computer is trying to boot from a non-bootable source, such as a hard drive, flash drive, optical drive or floppy drive that is not properly configured to be used as a boot device.

Follow these steps when the error Bootmgr is missing is displayed.

NOTE: Because each of these steps represents a possible solution to this issue, check the computer status after completing each step.

1. Press and hold the Power Switch for 5 seconds to turn the computer off, and then restart the computer.
2. Turn off the computer, remove the media from all drives (optical, USB, floppy, etc.) and restart the computer.
3. Reset the computer BIOS  to the default settings.

   WARNING: There is a risk of data loss. When performing a full system recovery, all software applications, configurations, and data added to the restored drive will be erased.

4. Restore the entire C: drive to its original, factory-installed condition using the Restore C: Drive option in the VAIO Recovery Center.

   IMPORTANT: For model specific information about using the VAIO Recovery Center software, consult the operating instructions supplied with the product. Manuals are posted on your model support page.