Windows 10: account has already been added to this pc

I receive an error when adding an account to a PC saying the account has already been added to the PC.

:)

 

Remove account

I suggest you backup your personalized files first before removing the account.
To delete an account, follow these steps:

1. Press WIN + X keys and click Command Prompt (Admin) from the menu.
2. Type the following command and press Enter. Replace test with the name of your sister's account. Code:

 

Adding PC to Microsoft account list of devices

Hello,

I go into Microsoft account and look under list of devices and it tells me that there are no devices associated with the Microsoft Account. Really? That is strange because the PC I am using is signed in on the Microsoft account. Because the device is not
listed, it is causing problems with some apps and stuff.

From support around adding devices, it would seem you can only add win 10 devices? So is this why my PC is invisible - because it is running 8.1?

By the way, I have tried waiting for 30 days and it does not automatically appear. I have also signed in with a local and then redone with a Microsoft account and that does nothing either.

Any suggestions please?

regards,

 

Forum users with Hotmail/Outlook/Exchange account

The two-step verification emails show up in my inbox but I added a rule to mark the domain name safe a long time ago (verified that "techpowerup.com" is still in the safe sender list).