bcdedit /createstore C:\boot\bcd bcdedit /store C:\boot\bcd /create /d "Windows Server 2012 R2" /application osloader (Note the GUID returned) bcdedit /store C:\boot\bcd /set GUID device partition=C: bcdedit /store C:\boot\bcd /set GUID osdevice partition=C: bcdedit /store C:\boot\bcd /set GUID path \Windows\system32\winload.efi bcdedit /store C:\boot\bcd /displayorder GUID /addlast Older physical servers or VMs configured for legacy BIOS use MBR partitioning. Corruption here yields "Operating system not found."
| Error Code | Likely Cause | Quick Fix Method | |------------|--------------|------------------| | 0xc000000e | BCD corruption | Method 2 | | 0xc000000f | Bootmgr missing | Method 2 (fixboot) | | 0xc0000225 | Partition issues | Method 2 + diskpart active partition | | 0xc000021a | Registry corruption | Method 4 | | INACCESSIBLE_BOOT_DEVICE | Storage driver | Method 7 | | 0xc0000034 | Boot file missing | Method 2 (rebuildbcd) | windows server 2012 r2 boot repair
Whether you are facing the ominous "INACCESSIBLE_BOOT_DEVICE" blue screen, a black screen with a blinking cursor, or the frustrating automatic repair loop, this guide provides a systematic, step-by-step methodology to diagnose and repair boot issues on Windows Server 2012 R2. The recovery environment allows you to replace it
Introduction: The Critical Nature of a Server That Won’t Boot or the frustrating automatic repair loop
Sometimes bootrec /rebuildbcd fails with "Element not found." Use BCDEdit:
bootsect /nt60 sys /mbr A corrupted SYSTEM registry hive breaks boot with errors like 0xc000021a or 0xc0000034 . The recovery environment allows you to replace it with a backup copy.
From Command Prompt: