Deleting User Account

1stly you need to be an administrator and not logged on
as the users you want to delete. To chane you account to
a administrator go to Control Panel> User Accounts click
on the user you want to be a administrator then click
change account type. After all that go back to User
Accounts go to the user you want to delete and click
delete user do the same with both.

PS Remember you still have to be logged on as not the
one's you want to delete.