Windows 2008 R2 BOOTMGR is missing (Fix)

You will need a Windows 7 x64 DVD.

1. Boot from your Windows Server 2008 R2 x64 DVD.
2. Repair
3. Command Prompt
4. rename c:\boot\BCD bcd.old (if folder missing, don't mind and continue to next step)
5. Delete c:\boot\bcd (if folder missing, don't mind and continue to next step)
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.

Hope it helps