In many cases we need to urgently block the Joomla user account of our Joomla website users. This many be for various reason. I can remember, once I have to block a administrative user account of my client website,when he informed me that his password has been probably leaked.
So get ready to face this time of situation when we need to immediately block any Joomla user. For this
Login to your Admin panel.
Go to Site -> User Manager.
Click on the User name you want to block.
From the user details frame – Block User option – Select the Yes option.
You may disable or completely delete the Joomla user account as per your requirement.
Note : Block suspicious users before they block you.