https://stackoverflow.com/questions/17031552/how-do-you-take-file-ownership-with-powershell
I’ve figured this out. I can only be done with SE_RESTORE_NAME permissions.
I learned how to do that from: http://cosmoskey.blogspot.com/2010/07/setting-owner-on-acl-in-powershell.html
And with a comment from: http://fixingitpro.com/2011/07/08/set-owner-with-powershell-%E2%80%9Cthe-security-identifier-is-not-allowed-to-be-the-owner-of-this-object%E2%80%9D/
Here’s the full command that works for me: