Is that any process for booting After changing owner ship of files?

Hello all,

My elder sister said she wants to boot after changing the ownership file.

I was working on extracting files from an HDD that I took out of an old computer so that I can move the files to a new computer. In the process, I was not allowed to access the files in the user file from the old computer. I followed some instructions I found online about how to change the owner of the files and did so.

This worked great as I was able to move the files over. I then put the old HDD back into the old computer and tried to boot. Unfortunately, the computer will not boot Windows 10 and asks me to “Remove Disks or other media. Press any key to restart”.

Does anyone know of a way to make this disk bootable again without losing the data that is on the disk?