Video on Setting up Disqus.com Comments
Register at Disqus.com
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Visit http://disqus.com and sign up for an account. You'll need to register the URL of your WordPress site.
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Install the Disqus Plugin
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Inside your WordPres site, install the plugin called Disqus Comment System.
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The next step is to configure the Disqus plugin. You'll need to enter your Disqus.com username and password and then select the site you entered earlier.
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If you've had your WordPress site for a long time and have existing comments, Disqus will then offer you the chance to migrate them.
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Configure the Disqus Plugin
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To configure the Disqus plugin, click Disqus under the Comments tab. When you've chosen your settings, Disqus will be ready for use on your site:
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