There is a part of config-sample.php that is headed'Authentication Unique Keys.' You will find. A hyperlink is fix hacked wordpress site within that part of code.You change the keys you have with the special keys given by the website, copy the contents which you return, and must enter that link in your browser. This makes it harder for attackers to generate a'logged-in' dessert for your site.
The one I recommend, and the stronger approach, is to use one of the password generation and storage plugins available for your browser. People like RoboForm, but I believe after a trial period, you have to pay for it. I use the free version of Lastpass, and I recommend it a knockout post for those of you who use Firefox or Internet Explorer. That will generate secure passwords for you.
You first need to create a user, before you can delete the default admin account. To do this go to your WordPress Dashboard and click on User -> Create New User. Then enter all of the information you need to enter.
You can make a firewall that blocks hackers. The firewall prevents the hacker from coming to your own files. You must also have updated version of Apache. Upgrade your PHP as well. It is important that your system is always full of upgrades.
There is. People always know additionally they could drop by your login form and where they can login and try out a different combination of user accounts and passwords. So as to stop this from happening you need to set up Login Lockdown. It is a plugin that lets users attempt and login with a wrong password three times. After that the IP address will be banned from the server for a certain amount of time.