I see. Because taking ownership may break the stuff, I suggest you to create a new user account and move the data later.
https://www.tenforums.com/tutorials/5440-add-lo...
Add a new local account first, make it admin, move the data over to the new account and then convert the local account to MS one.
https://www.tenforums.com/tutorials/6917-accoun...
https://www.tenforums.com/tutorials/5375-micros...
Content on the above blog is written by a Microsoft MVP so it is safe. However, do watch out for the ads.