Barb, I really appreciate that you are investing time and effort to get this escalated. The issue is deeply frustrating as it has bricked a Surface RT that is being used by a young student. I had to reset it as it had other update issues and the moment I got the last update working seems to be the moment the MS-service logon mess started.
It is quite frustrating and is putting off people getting Microsoft devices, as they (maybe correctly) think that after a couple of years MS will not be caring about the devices and just let them die.
I know that modern computers are complex beasts and it can be difficult to make anything that hasn't got a side-effect somewhere with someone. But MS also has to understand how utterly dependent they have made us of their devices. Specially as this is a case where Hardware, Software and Services are all branded and sold under their name. A Microsoft Surface RT running Microsoft Windows with no access to a Microsoft Account is very close to the definition of "expensive paperweight". We do deserve better than a "sorry that this isnt working for number of you, we'll try to get it to work sometime".
Thanks to all the volunteers out there who are investing time and effort to help the rest of us. It does indeed restore my faith in humanity.