The following procedure is tested to be working on Server 2008 R2 but may also work on other operating systems.
- Boot the server into recovery mode (or from mounted ISO and select “Repair”)
- Launch the command prompt and run the following command to repair the MBR
- bootrec /fixmbr
- Create a backup of the Boot Configuration Data (BCD), then rename the existing BCD
- bcdedit /export c:\bcd_backup
- c:
- cd boot
- attrib bcd -s -h -r
- ren bcd bcd.old
- Rebuild the BCD – enter “y” when prompted
- bootrec /rebuildbcd
- Bypass integrity checks that will prevent Windows to boot
- bcdedit (note the Windows Boot Loader identifier – WBL)
- bcdedit -set <WBL identifier> nointergritychecks 1
- exit
- Reboot the server
