Windows 10: How can declutter User Accounts which are not used now?

Over the years, I have accumulated several unnecessary and unused user accounts. I would like to delete them. Could anyone assist me, please?

:)

 

Settings can't be opened using the built-in administrator account


Hello,
Unfortunately I have the same issue as Dabz from upgrading win7 to win10.
I've tried opening settings using all the suggested methods and it will not load using my account with Administrator access nor the built-in Administrator profile. I also tried other methods not listed such as using Run. Control panel is just a stepping stone to add users in Settings.
I'm also having explorer.exe issues, which I believe is preventing Settings from loading.
Using cmd (Admin) I successfully created a new user profile [and granted admin access also using cmd (Admin)], however win10 will not allow this account to log on. win10 does not list this new user within control panel but it does in the start menu. win10 will not allow to log in or switch to the new account via the start menu either.
I can access settings in Safe Mode but this will not allow me to create a new account.
Any help/suggestions will be greatly appreciated.
Cheers

 

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:

 

I can't rename my user account

Hello Owen,

Welcome to the Microsoft Community.

• 
  Are you using a Microsoft account or local account?
  

If you are using local account, I suggest you to follow the below steps to change the user name.

Please follow the steps to rename the user account in Windows 10.

a. In the search box, type user accounts and click on User Accounts.

b. Click on “Change your account name”

c. If it’s prompting for password please enter and click on Yes. If you do not have password click on Yes.

d. Enter the new user name.

e. Click on change name.

If you face any more issues while working with Windows do post on Microsoft Community Forum.