diskpart
sel disk 0
list vol

Verify that the EFI partition (EPS - EFI System Partition) is using the FAT32 file system. Assign a drive letter to it that is not already in use.):

sel vol <number of volume>
assign letter=<drive letter>:
exit

Sometimes fails:
cd /d <drive letter>:\EFI\Microsoft\Boot\
bootrec /FixBoot
 
ren BCD BCD.old


Boot letter below is letter from one assigned above for EFI partition

Pre-1709:
bcdboot c:\Windows /l en-us /s <boot letter>: All

Post-1709:
bcdboot c:\Windows /s <boot letter>: /f UEFI