System recovery unable to repair bootloader

4.5

The "Startup Repair" tool fails to fix the boot files, leaving the PC unbootable.

Symptoms
  • "Startup Repair couldn't repair your PC"
  • Log file: SrtTrail.txt
  • Infinite repair loop
Possible Causes
  • Severely corrupted BCD
  • Wrong partition marked active
  • Hardware failure

Step-by-Step Fix

1

Manual BCD Rebuild

Run "bootrec /rebuildbcd" followed by "bcdboot c:\windows /s s: /f uefi".

2

Check Partition Style

Ensure your drive is GPT for UEFI systems or MBR for Legacy systems.

3

Disable Early Launch Anti-Malware

Select option 8 in Startup Settings to bypass driver signature checks.

When to See a Technician

If manual repair fails, you may need to delete and recreate the EFI system partition.

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