Windows 10: How do I fix account-level permissions on Windows 10 Home?

So, I want to say this: my own account works fine. Most of my kids' accounts work really well. But one kid's account has a really weird issue. We have 7 people in our household, spread across 5 machines.For Christmas, there was a shiny new Windows S laptop for school. We started a new Microsoft account for the&nbs

:)

 

Windows 10 permissions...

How is the NAS on windows 10 Pro? Is it software or a share? Did you check ntfs vs share permissions?

 

Windows 10 permissions...

Ok so I feel officially dumb I am trying to copy my steam library to my NAS. Both are on windows 10 pro and both have full control in the file manager. Neither windows nor fast copy will allow me to copy, both list a permissions error? This was never an issue with windows 7...so first off thank you microsoft god forbid I want to back up my data, second off what the heck do I need to do to make this work. All I could fine online was to set full control and that obviously didn't help.

Also robocopy doesn't apparently work with network locations?

 

Strange Windows 10 User Account issue.

Unfortunately I had done those steps numerous reboots, it just, reappears for no good reason. The base account isn't even a Microsoft account, it's a local account.

I haven't quite tried the built in administrator account on W10, but so far in my experience on my own computer, the built in account seemed to have absolutely no more control than I did on my own.

It's just strange, I go in, it warns me twice about deleting the account, then it's gone. Reboot, and it's back?

EDIT: Just to specify, both command line and Netplwiz both say only HIS account exists on the computer, it doesn't list this rogue account. This is what I meant in my first post about the fact that even Windows doesn't seem to believe it exists, HALF the time. *Frown