Windows 10: Cannot remove account under “Accounts used by other apps”

I have a Microsoft surface laptop. I use it with both my personal and university Microsoft accounts. However at some point, one of my children logged in with their school account, and now I cannot remove it from my computer. It is causing the following issue:When you open “File Explorer”, in the top right hand corner, it says “please sign in”. Hovering over it, it reads “one of your accounts needs attention to show files from Office.com in Home”.Under settings - accounts - accounts used by other apps, this school email account is showing up. There is no button to delete it. There is only a man

:)

 

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:

 

App Store and iTunes Accounts Hacked

if you have itunes account beware guys,

source tomshardware

 

Need help with permanently removing accounts from Mail App

This is a shared PC and I want to either remove the email accounts that are associated with the Mail App permanently or to deactivate the automatic sign in (if there is one).

I've gone to Manage Accounts - Delete Account from this device. It tells me that the account has been successfully deleted from this device.

YET it will reactivate the account (without me entering a PW) if I choose to Add Account, it lists suggested accounts that can be added, which in this case, it lists our Outlook accounts. If I choose an account to be "added" it adds my Outlook account to the Mail App, and SOMEHOW it knows what the PWs are and automatically signs in and opens the accounts. I can see everyone's emails just by re-adding their accounts!

How do I solve this issue please! I have thought of uninstalling the Mail App, but if someone who shares the PC decides to install it, they will see everyone's email.