Windows 10: Did I delete my user account?

I got a new computer with Windows 10 on it and saw it gave me a username that is half of what I want it to be. I went to start>netplwiz and changed the name to what it was on my old computer.
It changed the name. Great. Then I got the following error when I went to the start menu "no mapping between account names and Security ID's was done."

When I go to find the user, it's gone completely. There is no administrator left and it shows no additional accounts so I'm thinking it somehow deleted it completely? What should I do? I did not back it up and am afraid to restart the system.

:)

 

Deleting User Accounts

If you can access the admin account through safe mode then all you have to do to remove the other account passwords is go into User Accounts in the control panel and either delete the accounts or, I'm not sure, remove the account passwords.

 

Facebook Allows Users to Delete Accounts

Yes, for quite some time, once you had a Facebook account, it wasn't going anywhere. Now, fortunately for college students and people with no attention span everywhere, Facebook now allows said people to delete their Facebook accounts. This was in direct response to user complaints about not being able to delete their accounts, if desired. Even if users were able to delete their own accounts, there were no obvious directions on how to do that. Another reason that Facebook decided to allow users to delete their accounts was a reason that could have gotten Facebook sued if they did not address it: privacy. The "I didn't actually make a Facebook" E-mails were really racking up in Facebook's inbox, and Facebook sometimes made it all too easy for people to research intimate/private/personal details of users' lives. At this point, deleting your account is just a help-page away. Facebook admins are considering adding a "delete account" button.

Source: The Inquirer

 

Deleted account keeps reappearing

Hi,

Thank you for posting your query in Microsoft Community.

Is it still appearing no matter how you try to delete? I suggest you to follow the steps below to remove user account from your computer, and check if it helps. Try the ones you’re comfortable with.

Step 1: Steps to Remove a User Account in Settings

• 
  Press Windows
  key, click on Settings.
  
• 
  Click on Account, click on
  Family and other users.
  
• 
  Select the user you want to delete under
  Other users and click on Remove.
  
• 
  Accept the UAC (User Account Control) prompt.
  
• 
  Select Delete account and data if you wish to delete account and the data and follow onscreen instructions.
  

Step 2: Steps to Delete a User Account in Command Prompt

• 
  Press Windows + X keys from the keyboard, select
  Command Prompt (Admin).
  
• 
  Type net user and hit Enter
  to list the user accounts on your device.
  
• 
  Type net user "User account”
  /delete and hit Enter to delete the user account.
  

Step 3: Steps to Delete a User Account in Run command.

• 
  Press Windows + R and type netplwiz, press
  Enter.
  
• 
  Select the User account, click on the
  Remove button.
  

Regards.