Hi, I'm Ana M. I would love to help you today.
Try to enter the Recovery Environment to repair Windows.
Press and hold the power button for 10 seconds to perform a complete shutdown, you must do this three times or more in order to enter Safe Mode.
Check this link in the Option (From a black or black screen)
https://support.microsoft.com/en-us/windows/sta...
Go to Troubleshooting - Advanced Options - Reset this PC
There you will have 3 options:
1- Keep my files and applications
2- Save my files
3- Do not save anything
I recommend you use the first option.
If you can't restore Windows after performing the previous steps.
I recommend you borrow a PC to create a USB to repair Windows
https://www.microsoft.com/en-us/software-downlo...
See here the correct way to recover your files when repairing Windows:
https://www.ubackup.com/windows-10/reinstall-wi...
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.