Since it seems like slmgr /dlv will not run properly on the computer, something appears to be really wrong with the Windows installed on it. The fact that you are only on build 10586.164 also points...

Do you have a COA (Certificate of Authenticity) sticker on the computer for Windows 7? Looks like this:...

Hmmm.... if you can't get slmgr /dlv to work:

try window key + r to bring up a run dialog. Run winver in it.

Also run showkey plus from this forum:
Showkey - Windows 10 Forums

Click on the...

I'm afraid you did something wrong. This is what we are looking for:

93752

We can start helping you if you open a command prompt (admin) [right click on the start icon and select that from the list]. Run:
slmgr /dlv

Post the results window here. There is no uniquely...