If the command above finds "0" Windows installations, the BCD might be so corrupted it needs to be deleted and recreated: :
This guide covers the essential methods to restore your server using the Windows Recovery Environment (WinRE) and command-line tools. 1. Accessing the Windows Recovery Environment (WinRE)
: On the "Install Windows" screen, select your language and keyboard settings, then click Next . windows server 2012 r2 boot repair
: Insert your Windows Server 2012 R2 DVD or bootable USB .
: bootrec /fixmbr Writes a new Windows-compatible MBR to the system partition without overwriting the existing partition table. If the command above finds "0" Windows installations,
: Use the bcdboot tool to copy fresh boot files from the Windows directory to the EFI partition: bcdboot C:\Windows /s S: /f ALL 6. Solving Post-Update Boot Loops
bcdedit /export C:\BCD_Backup attrib c:\boot\bcd -h -r -s ren c:\boot\bcd bcd.old Use code with caution. : bootrec /rebuildbcd 5. Repairing UEFI/GPT Boot Issues : Insert your Windows Server 2012 R2 DVD or bootable USB
For newer servers using UEFI instead of Legacy BIOS, the boot files reside on a small FAT32 EFI partition.
: Go to Troubleshoot > Advanced options . From here, you can select Startup Repair or Command Prompt . 2. Automated Startup Repair