Deleting users from your site is a two-step process: first you need to block them from accessing the site, and only then can you delete their account.

1. Click Administer » User management » Users. This will give you a list of users on your site.
2. Click the "edit" link next to the user you wish to delete.
3. Below the Status: heading, select "Blocked".
4. Click the "Save account" button.
• Now the user can't login. If you wish to keep the user on your system temporarily, in case you think you might re-instate their login privileges in the future, then you can stop here.
5. If you want to delete the user's account, first repeat steps 1 and 2.
6. At the bottom, click the "Delete" button. This will permanently delete the user's account as well as all of that user's content. There is no undo for this action.