Windows 10: Inadvertently set up a 'sign-into account' on PC and need it removed

Having got the family PC recently back from a service, I've been having to bit by bit reset up various aspects of the computer. One was our pc protection but forgetting that our provider was going to have to be re-downloaded, I clicked open the hidden icons and just clicked on the shield that was there and signed in to it which for this particular is my work email which is also a recognised Microsoft/Outlook account. Having really been caught at the wrong moment to have been asked to do this, I didn't realise I was actually signing in to Windows Defender and have ended up with the dam PC now looking for a password and my work email address set up and the entire thing is now an admininstrator account.
I really really want to remove my work email from this PC, but I can't find anywhere I can fully sign out, only bits about creating local accounts which I would be doing anyway. I have a Microsoft/hotmail account which I will gladly swap out the work email for, but I can't even find how or where I can do that either.
Any help or suggestions would be greatly appreciated. TIA

:)

 

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:

 

How to remove PIN when signing into Windows 10 Version 1703?

Hello William,

There are many ways to sign in to your PC. Follow these steps to remove PIN when signing in to your PC:

• Open Settings.
• Choose Accounts.
• Select Sign-in options.
• Under PIN, click Remove.

We'll keep an eye out for your response.

 

removing a microsoft account from a Windows 10 laptop

Hi,

To help resolve your concern, we suggest that you add a local account first on your PC, before removing the other account. Follow the steps below:

• To create a local account on your Windows 10 PC:

• Press the Windows key + R.
• Type netplwiz, and then click OK.
• Click Add.
• Click Sign in without a Microsoft account (not recommended).
• Click Local account, type a username, and a
  password (if you'd like one).
• Click Next, and then click Finish.
• Sign out of the Microsoft account you want to delete, sign in using the
  local account you created, and then remove the account you want to delete.

• To remove a Microsoft account from your Windows 10 PC:

• Click the Start button, and then click Settings.
• Click Accounts, scroll down, and then click the Microsoft account you would like to delete.
• Click Remove, and then click Yes.

Let us know how it goes.