Open your joomla database with the PhpMyAdmin. Update the table jos_users:
Look for user “admin”, in most cases with the id 62. Edit the password field and type in:
21232f297a57a5a743894a0e4a801fc3
in Joomla >= 1.0.13 type in:
af9083d4b82dbc0745b124db3b3cf15d:M0WuLowO4rtRTddG
Now you can login with user admin and password admin. Please don’t forget to change the password immediately.
Another possiblity is to open your database with PhpMyAdmin. Edit the the table jos_users where admin is the user inside. Change the passwort field definition to MD5 and type in your clear password. Than save it.
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