5 Solutions to "Fixboot Access Denied" in Windows 10, 8, 7
Step 4. Type the following command and press Enter after each command.
•list disk
•sel disk 0 (where 0 stands for the boot drive)
•list vol (note which volume is the EFI partition, mine is 4)
•sel vol 4
•assign letter=N:
•exit
Step 5. Type N: (the drive letter you just assigned and hit Enter.)
Step 6. After you have assigned a drive letter Using Diskpart, you can format the EFI partition using the following command.
•format N: /FS:FAT32
Step 7. Now, type bcdboot C:\windows /s N: /f UEFI and hit Enter. This command will repair your Bootloader.
Then try the bootrec /fixboot command again, fixboot access denied in Windows 10 could be solved.
