Windows 10 Safe Mode don´t accept password

Boot using a windows recovery disc or USB pendrive

Recover

Throbleshoot

Command Prompt

diskpart

list disk

Show disks  and verify number of the disk which contain windows

sel disk 0

list vol

Show volumes and verify the number of the Volume of type Fat32 with size arround 100MB or more

sel vol 2

assign letter=F:

exit

bcdboot c:\Windows /s F: /f UEFI

bootrec /fixboot