Windows 10: Can I safely delete this 2nd account

Could that be the root of Windows not updating to 1607? This in spite of repeated attempts.
Is there a guide as to 'force' the installation of the update?
Yesterday I was in the middle of running a (lengthy) backup and the pc suddenly rebooted to try and install the update.
Else this may be happening again, the update is available and windows wants to install it, but bad luck, it does not
(notification: we couldn't finish installing updates)

Thanks
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That wouldn't have any affect on Windows Update.

 

@Brink
As a follow up - my solution has been the following
The account used on my 2nd PC was the one listed under "Email, Calendar and contacts", see my very first screenshot.
I could not remove or change that account. Period.
Solution (in my case) was to reset Windows on my 2nd pc and change the username, userID, etc. to be the same as on
my 1st PC.
Now, on 1st PC the name/email address under "Email, Calendar and contacts" are the same as 'admin' at the top of Settings->Accounts.

Matter now solved, the use of the 'alias' on my 2nd pc was holding me back of deleting it.

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Great news mate. *Party