: 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 windows server 2012 r2 boot repair
: Insert your Windows Server 2012 R2 DVD or bootable USB . : Use the bcdboot tool to copy fresh
: Go to Troubleshoot > Advanced options . From here, you can select Startup Repair or Command Prompt . 2. Automated Startup Repair Repairing UEFI/GPT Boot Issues : Insert your Windows
: bootrec /fixboot Writes a new boot sector to the system partition, which is useful if the boot sector was replaced by a non-standard one or is corrupted. 4. Rebuilding the Boot Configuration Data (BCD)
: Run diskpart , then list vol . Look for a small volume (usually ~100-300MB) formatted as FAT32 . Assign a Letter : sel vol assign letter=S: exit Use code with caution.
The system will scan for issues like missing system files or corrupted boot configurations and attempt to fix them automatically. 3. Repairing the Boot Record (MBR & Boot Sector)