Hello
I assume you can still sign in using PIN or finger print, etc, right?
If so, this is what you do:
- Type netplwiz in the search on the taskbar and hit enter. When launched, click on "Add". On the next window, go ahead and sign into your new Microsoft account.
- When the above user is created, back to the main netplwiz page, double click on this new user, go to the Group Membership tab, make it administrator. Save the change.
- Restart the computer. Sign into the new user you created in Step 1.
- If you have data at the old username folder, go to C:\users\old username folder, find them and copy them into C:\users\new username folder.
- Type sysdm.cpl in the search on the taskbar and hit enter, go to Advanced tab, click on the "Settings" button at the User Profile section. Then delete the old user profile.
- Launch netplwiz again, delete the old user from there.