To delete an email account from your computer, you need to access your account settings. Open the mail app you use (such as Outlook, Mail for Windows 10/11, or another email client), locate the account settings menu, and select the account you wish to remove. Click on the Delete account from this device option and remove the account. You can also delete your Microsoft account to remove the email associated with it. That said, back up your data to ensure you don’t lose anything important.