To install Wordfence and get a more secure WordPress website simply sign-in to your WordPress blog. Then click your “Plugins” menu and click the “Add New” link at the top.
Type “Wordfence” in the search box that appears.
Click the “install” link next to the Wordfence plugin that appears in the list.
Activate Wordfence once the install completes.
A message will ask you to enter an email address for alerts. This is important as this is where alerts about security issues with your WordPress site will be sent. Enter an email address, save your options and you’re all set.
If you would like to upgrade to the premium version of Wordfence, you can visit www.wordfence.com to get an API key and then enter that key on your options page and save your options. You will be upgraded and all the premium features will be available to you including the realtime blacklist.