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Repair a failing boot disk (constant repair mode)

Boot from a Windows 10 Install Media (USB disk)

Select Next on language/region

Select Repair PC option on bottom left

Select Troubleshoot

Boot a command prompt

run diskpart

list disk to identify the internal hard disk

select disk # to select the proper disk

list the disk volumes – list vol

Identify the EFI hidden volume # number (Hidden, kind of 512Mb, could be formatted FAT32)

Selection this EFI hidden volume : select vol #

Assign a drive letter : assign letter=n:


browse from command line to this EFI drive letter N:

Repair the BCD boot : bcdboot C:\windows /s n: /f UEFI

Repair the MBR : bootrec /fixmbr

Reboot the machine