Your PC Did Not Start Correctly
Bitlocker was on. Luckily, there was a local admin account active to access Windows Recovery Environment needed for both on-disk Windows RE and on-usb Windows RE and the files could be seen.
The following was without boot success.
Automatic Repair
Startup Repair
Uninstall Recent Feature Update (none could be found)
Uninstall Recent Quality Update (worked but still no boot)
Boot to Command Line: chkdsk /f /r c:
sfc /scannow
dism /image:c:\ /cleanup-image /checkhealth
dism /image:c:\ /cleanup-image /scanhealth
dism /image:c:\ /cleanup-image /restorehealth
MBR
bootrec /fixmbr
bootrec /fixboot
bootrec /scanos
bootrec /rebuildbcd
GPT (UEFI/GPT)
Find EFI Partition; not the Windows partition.
diskpart
list disk
sel disk number-here
list vol
sel vol number-here
assign letter=z:
exit
cd /d z:\efi\Microsoft\Boot|
bootrec /fixboot
ren BCD BCD.bak
bcdboot c:\Windows /s z: /f All
more c:\windows\system32\logs\srt\srttrail.txt shows a result as bad hard disk.
Noticed that when trying to boot, there was no hard drive disk activity light. This indicates that the system isn't even trying to access the internal SSD. This indicates that the bootloader is either corrupt or pointing to the wrong location.
BIOS
boot options
view shows nothing
add new boot option
name Windows-newboot
select local ssd device
browse EFI\Microsoft\Boot\bootmgfw.efi
save
reboot
F12
Select Windows-newboot
Disk activity & boots fine.
Something causes the bootloader corruption. Either a bios update causes bootloader corruption or a Windows Update causes a new partition with new EFI but the bootloader is still trying to use the old location. My guess is on the latter.