Keith Nuttle wrote on 08/27/2015 6:21 AM:
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?

No.

--
...winston
msft mvp windows experience