Hi, GN85
My name is Aracely, I am an Independent Advisor. I would love to help you today.
I recommend you borrow a computer to create a USB and repair Windows.
https://www.microsoft.com/en-us/software-downlo...
Follow the steps in this link to repair Windows without losing your files.
https://www.intowindows.com/repair-windows-10-i...
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.
Let me know if the information has been helpful in solving your problem.