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Once your is complete and the server is back online, take these steps to avoid recurrence:

| 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) |

Repairing a Windows Server 2012 R2 boot failure typically involves using the to rebuild the Boot Configuration Data (BCD) or fix the Master Boot Record (MBR). 1. Access the Recovery Environment