Have you forgotten you Joomla Administrator Password? You can easily Reset Joomla Administrator by going through this blog post. Here is a simple solution for you.
Go to your mysql database. Find the table #_users .Then browse and edit the super administrator row.
Generate an encrypted password. Suppose I need to change my password to admin, so I need to add the encrypted md5 (admin) . To do this you can use an online website https://www.md5.cz/ . Write down the password you want to set and get the md5 of it. As I wanted to have admin as my password so I need to update the password field in mysql database to 21232f297a57a5a743894a0e4a801fc3 .
Once you change it, you can go to yourwebsite.com/administrator and login into the website. If you still need assistance , then you can contact us.