Verify Secure Boot Status:
Check BIOS Mode:
Open PowerShell as Administrator.
Execute command: bcdedit /enum firmware
. Check for 'Windows Boot Manager' boot entry.
If Missing, Add Secure Boot Entry Manually:
bcdedit /set {bootmgr} path \EFI\Microsoft\Boot\bootmgfw.efi
shutdown /r /fw /t 0
Alternative Method:
diskpart
.bootrec /scanos /s c:\Windows /s: /f:uefi