Bootmgr is missing

Ran into an ugly problem with a Windows Server 2008 R2 x64 not booting because of “BOOTMGR is missing”. I’ve tried a great deal, but this solution – involving booting and repairing with a Windows 7 Pro – strangely, worked for me!

Not sure how this happens, but suspect some sort of failure in Windows Update because on the first successful boot an update process was completed.. This might just as well be a coincidence though..

Solved this way:

  1. Booted from installation media (Windows Server 2008 R2 x64)
  2. Repair
  3. Command Prompt
  4. rename c:\boot\BCD bcd.old : this will backup your bcd file just in case you want it.
  5. Delete c:\boot\bcd
  6. Restart your computer
  7. Remove your WS2008R2 DVD and install the W7x64 DVD.
  8. Boot from the DVD and do a repair.
  9. It will offer to repair automatically accept.
  10. Reboot and this is the “trick” boot the DVD again and do a repair.  Keep doing this process until it does not find anything wrong.
  11. Your server should boot again.

P.S. This article is basically a copy of a forum post found here. Many thanks to GeorgePR!

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