BootRec /FixBoot Access is Denied Windows 10 Error [Fixed]

The BootRec /FixBoot access is denied Windows 10 error is likely caused by a corrupt EFI directory. Fix the problem with these 3 steps.

Here are the steps to fix this error:

Step 1: Boot to Windows 10 Recovery Environment

• Insert a Windows 10 media into your computer (DVD or USB)
• Configure BIOS boot sequence to boot from the above media first
• When you receive the prompt to boot from CD or DVD, press any key to continue

• At the Windows 10 installation screen, click Next.

• Then click Repair your computer.

• When Windows boots to recovery environment, click Troubleshoot.

• When Advanced options screen loads, click Command Prompt. The Command Prompt will display. Proceed to step 2.

Step 2: Assign the EFI Volume a Drive Letter

The next step to fix bootrec /fixboot access is denied error in Windows 10 is to assign the EFI volume a drive letter.

This task will be performed at the recovery environment.

• At the command prompt type the command below. Then press enter

DISKPART

DISKPART prompt will open

• At the DISKPART promt, type this commend and press enter

list disk 

All available disks on your computer will be listed (displayed).

• Next, to select the disk with your Windows 10 installation, type the command below. Then press enter.

Select disk 0

My Operating system is installed in Drive 0. So I used “disk 0”. However, if yours is installed in a disk with a different number, change 0 to that number in the previous command.

The command will return the result below:

• To display volumes in the selected disk, type the command below. Then press enter.

list volume 

The result of the command is shown below:

At this point, you need to identify your EFI volume from the list. Here is how you identify the EFI volume:

1. It should be formatted with FAT32
2. Size is likely to be about 100mb (shown as 99mb in this example)
3. The Info column is likely to show the volume as “Hidden”

To select your EFI volume, type this command and press enter.

 select volume 3  

Change 3 to your EFI volume number. Here is the result:

• Next, assign the volume a drive letter with this command.

assign letter P: 

The last step to fix bootrec /fixboot access is denied error is to format the volume. Then recreate the corrupt EFI directory structure.

Step 3: Recreate the EFI Directory Structure

• To format the partition, type the command below. Then press enter.

format P: /FS:FAT32

Finally, the fix for bootrec /fixboot access is denied error…

• Recreate the EFI directory with this command:

bcdboot C:\windows /s P: /f UEFI

Conclusion

The steps in this guide should resolve bootrec /fixboot access is denied error.

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Finally, if you want more Windows 10 fixes, visit our Windows 10 Support page.

You may also benefit by reading Advanced troubleshooting for Windows boot problems. This Microsoft guide provides additional options to fix Windows 10 boot problems