Solutions for Resolving Boot Sector Error Oxc000000f in Windows 10 and 11

Step 1: Disconnect Additional Cables/Hardware Devices

The presence of faulty peripheral devices may be the source of the Oxc000000f error. Therefore, it is advisable to unplug external devices such as USB drives, DVDs, or memory cards (excluding the keyboard and mouse).Once completed, restart your PC to check for improvements.

Pro Tip: Always create a system restore point before making any significant changes to your system.

Step 2: Repair Your System Using the Media Creation Tool

If the Oxc000000f BCD error persists, you may need to rectify the problem using the Media Creation Tool by following these steps:

Create Installation Media Manually

• Download the Windows Media Creation Tool on a different functional PC. Windows 11 users can here for their tool.
• Double-click the setup file once the download is complete to initiate the installation process.
• If prompted by UAC, click Yes to grant access.
• Choose your Edition, Language, and Architecture, then click Next.
• Select a USB drive (minimum 4 GB) to store this file and click Next.

Turn off the affected computer and connect the newly created Windows installation media. Then, power it up and repeatedly press the appropriate keys (like F2, F9, F10, Del ) to access the BIOS settings.

Navigate to the Boot Order section using the arrow keys, setting the First Boot Device to DVD/USB. Save changes by pressing F10 (or whatever key is recommended) and restart the system.

Step 3: Utilize the Bootrec.exe Tool

The bootrec.exe tool is designed to rebuild the Boot Configuration Data (BCD), a crucial process for resolving startup issues. Here’s how to use it:

• Connect the Windows installation media (DVD/USB) and reboot your PC.
• At the bootable screen, press any key to bypass the prompt.
• Select language, time, currency, and keyboard layout, then click Next.
• Click on Repair your computer.
• Then, select Troubleshoot, followed by Advanced Options.
• Choose Command Prompt from the available options.

In the Command Prompt, type Bootrec.exe and press Enter to begin repairing the BCD files.

After the process is complete, restart your PC to save the changes. If bootrec.exe fails to fix the BCD files, you may need to delete and rebuild the BCD. Enter the following commands one by one:

bcdedit /export C:\BCD_Backup c: cd boot attrib bcd –s –h –r ren c:\boot\bcd bcd.old bootrec /RebuildBcd

Following these steps will help resolve the Boot Error code Oxc000000f and should restart your system normally.

Step 4: Repair Existing Boot Configuration Data

Corrupt Boot Configuration Data can lead to the Oxc000000f error. You can create a new BCD file by following these methods:

Important : Before proceeding, ensure you have a Windows 11/10 media creation tool (USB/DVD) formatted with FAT32 as UEFI-based PCs do not recognize NTFS drives as installation media.

• Insert the Windows installation media and restart your system.
• Access the BIOS Settings using the designated function keys (e.g., F2, F9, Del ).
• In the Boot Device category, select your USB drive as the installation source.
• Press Shift + F10 to access the Command Prompt.
• Type diskpart followed by Enter.
• Use the command list disk to identify all storage disks.
• Select your disk by typing select disk 0 and pressing Enter.
• Type list vol to display all volumes.

Locate the EFI and Boot volumes (the one containing Windows OS).Assign an identifier to the EFI volume:

• select Volume 1 (assumed EFI volume).
• Assign the letter P by typing assign and hit Enter.
• Exit diskpart by typing exit and Enter.
• Then navigate to: cd /d P:\efi\microsoft\boot\.
• Type bootrec /fixboot to create a new boot sector.
• Rename the corrupted BCD file using ren BCD BCD.bak.

To create a new BCD file, type the following command:

• bcdboot C:\Windows /l en-us /s k: /f ALL and press Enter.

Ensure that C: denotes the drive where Windows is installed, and conclude by closing the Command Prompt and rebooting your system.

Step 5: Create an EFI Partition

If previous methods fail, you may need to recreate the EFI partition. Here’s how:

• Acquire a legitimate Media Creation Tool with at least 200 MB of available disk space.
• Insert the Windows installation media and reboot your system.
• When restarting, use F2, F9, Del, or Esc to open the Boot Manager.
• Select your USB as the primary installation media.
• Press Shift + F10 to open Command Prompt.
• In the Command Prompt, type the following commands sequentially:

Diskpart list disk select disk 0 list partition select Partition 1 (Ensure sufficient free space on your disk) shrink desired=200 minimum=200 create partition efi list partition select partition 2 (Assuming the new partition is 2) format fs=fat32 list vol select vol 3 (Assuming volume number 3 is the EFI partition) assign list vol

Finally, type:

• bcdboot C:\Windows /l en-gb /s B: /f ALL where C: is the Windows drive and B: is the EFI partition assigned letter.

After completing these steps, restart your system to apply the changes.

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