Hi, Maddocks977,
Sorry to hear about this issue.
You may try the following to disconnect the account:
- Click the Start (Windows) > Settings > Accounts > Access work or school.
- Select your school account, then select Disconnect.
- Select Yes to confirm your actions.
Note that this will not delete the account entirely, it will just remove access from your PC
For more information, you may check out this support article:
https://support.microsoft.com/windows/add-or-re...
Best regards,