On 2015-08-27, Keith Nuttle wrote:
I have three computers
The computer names are lap, desk, tablet.
lap and desk are running Windows 8.1, and tablet is running Windows 10.

The account names are the same; MS account, John Doe, and the local
account, John Doe2.

Would this prevent one computer from installing MS updates and apps
from the Windows store?

Not exactly the same, but both desktop & laptop are running win10 pro.

The ms account is the same for both BUT the local user name is
different. For unknown reason, I was forced to use a different local
user/account (like your john doe2) while the laptop is able to use the
same local account prior to the win10 upgrade (as in your john doe).

No problems, but don't know why that happened. And if windows store
behave like google's store & their apps, then you only need to pay once
for an app/game & will be able to install the app onto all the windows
devices as the store only use the ms account name.

I've got 4 tablets & have installed the same paid app onto all of the
tablets. I've used the same app at the "same time" as in an ereader
will have a book being read while another tablet will have a different
book being read (not quite at the same time, practically).