Problem after trying to reinstall Win 10 on Microsoft Surface Pro 4

Hi all,

I have tried to reinstall Windows 10 on Microsoft Surface Pro 4 but when it gets to Getting finished near the end I get a dialog box saying Windows could not update the computer's boot configuration. Installation cannot proceed.
I then try the following:

1. Boot into your recovery USB and go to the CMD
2. type "diskpart" then "list disk"
3. select the internal drive: "select disk 0"
4. list volumes: "list vol" and select the boot volume (should be ~260MB): "select vol 1"
5. Then assign a drive letter to the partition: "assign letter=b:" 6.exit disk partition and "cd /d b:EFI\Microsoft\Boot"
6. run "bootrec /fixboot"
7. rename the BCD file "ren BCD BCD.bak"
8. recreate the BCD store: "bcdboot c:\Windows /l en-gb /s b: /f ALL
9. Reboot

When I get to step 6 I always get an Access is denied error.

Please advise how to resolve issue

I am using a Windows Surface Pro 4.

It should not be so complicated.

Thank you for all help.

Why not do select disk 0, then clean, exit, exit. Install Windows 10 to the unallocated space. A clean install should be done to unallocated space rather than an existing partition to allow setup to create the partitions that it wants to.