Windows 10: Windows 11 get's confused on which account I'm using

I have been using Windows 10 for many years and have never had so many account problems. I've upgraded to Windows 11 and now I am having many problems with accounts. Here is my current issue.I am doing some work for a new company and they gave me an email account to use when working with them. So, I am trying to get this account setup. Here is the issue.Log in to office365 with the account information that they give me. Let's say for example *** Email address is removed for privacy *** am able to log in with the password supplied it takes me to the change password screen. From this point things go sideways.When I put

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User Account Confusions

Certainly am ! First to uninstall Malwarebytes and disable Secure Boot. Then I am good to go.

Left starting until I could get a clear run,


DOWNLOADING ISO
I am confused by the Download Menus which suggest downloading twice which is fine but in
between seems to suggest downloading and UPDATING Windows 10. I seem to remember being warned at some stage updating Windows could cause confusion. Should I ignore this Dialogue - menu - step and proceed straight to downloading from the Microsoft site ?

Also I need the mouse to work efficiently is it ok
a) to leave it in and/or
b) to remove it an put it back during the Repair install ?

The touch pad is unreliable and only seems to work intermittently,

 

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:

 

Strange Windows 10 User Account issue.

Unfortunately I had done those steps numerous reboots, it just, reappears for no good reason. The base account isn't even a Microsoft account, it's a local account.

I haven't quite tried the built in administrator account on W10, but so far in my experience on my own computer, the built in account seemed to have absolutely no more control than I did on my own.

It's just strange, I go in, it warns me twice about deleting the account, then it's gone. Reboot, and it's back?

EDIT: Just to specify, both command line and Netplwiz both say only HIS account exists on the computer, it doesn't list this rogue account. This is what I meant in my first post about the fact that even Windows doesn't seem to believe it exists, HALF the time. *Frown