Hi there! My name is David. It’s a pleasure to help you today.
Thank you for posting your issue. I understand your situation and know it can be frustrating if your PC does not boot correctly. However it is not recommended to delete system files if you do not know their function. That is why these files are protected so that the user cannot modify or delete them.
Try to enter the recovery environment (WinRE) Turn on your PC and when you see the Windows logo, shut it down using the power button. Do this several times until WinRE loads.
In WInRE go to > Troubleshoot > Advanced options > Command Promp
When it asks for the password, try using the local account password, or attempt to proceed without a password.
In Command Prompt, use the following commands followed by the Enter key:
sfc /scannow /offbootdir=C:\ /offwindir=C:\Windows
DISM /Image:C:\ /Cleanup-Image /RestoreHealth
As a last option, I would suggest trying a new installation of Windows.
To avoid losing access to your files, you can make a backup by connecting your drive to another PC. With the BitLocker key for your drive, you will be able to access the folders and files so you can back them up before deciding to perform a new installation of Windows.
Let me know if the shared information has been helpful. Regards.