There is a part of config-sample.php that is led'Authentication Unique Keys.' You will find. There is a hyperlink how to fix hacked wordpress inside that part of code.You copy the contents which you return, have to enter that link in your browser, and change. That makes it harder for attackers to quickly create a'logged-in' dessert for your website.
Well, we're actually talking about WordPress but what's the feeling if your computer is at risk of hackers of performing upgrades and security checks. There are malicious files that can encrypt key loggers. When this occurs, my site regardless of what you do, they are easily able to access everything that you type on your keyboard. You can find a good deal of antivirus programs that are good online. Just look for a credible antivirus program or ask experts about this.
Maintain control of your assets that are online - Nothing is worse than having your livelihood in the hands of someone else. Why take chances with something as important as your website?
You can extend the plugin features with premium plugins such as: Amazon S3 plugin, Members only plugin, DropShop etc.. I think this plugin is a fantastic choice and you can use it at no cost.
Do your homework and some searching, but if you're pressed for time and need to get this done once and for all, try out the WordPress security plugin that you can check here I use. It is a relief to know that my site (and company!) are secure.