Hi,
Follow the steps below the delete your Microsoft account.
- Right click Start button and select Control Panel.
- Click User Accounts and click Manage another account link.
- If prompted by UAC, click Yes.
- Click user account which you want to delete.
- Click Delete the account link.
- Click Delete Files or Keep Files for what you want to do with the user account's personal files.
- Click Delete Account to confirm.
- When finished, you can close the Control Panel if you like.
Note: You must be signed in as an administrator to be able to delete a user account. You will not be able to delete a user account that is currently signed in. You will need to sign out the user first. Be sure to always have at least one enabled administrator account on the PC to avoid not being able to perform actions that require administrator rights.
To create a Microsoft account, check this article and follow the instructions provided.
Let us know how it goes.