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From the WordPress Dashboard home screen,

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go over to the left hand side, and click "Updates."

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And you are going to see any updates that are available for plugins or themes,

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also any updates that are available to the WordPress core.

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You can check at anytime for any updates,

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and for demonstration purposes, I'm just going to re-install WordPress, and you can see that it is downloading now,

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checking the update, it verifies, does the install, and then brings you to, after it's done,

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then brings you to the welcome screen of your point release,

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this is WordPress version 4.2.2.

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And if you go back over and click on the "Dashboard" and then "Updates,"

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you can see that it has been re-installed at this point.

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You can also download the zip file,

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and you can go to your "Update Plugins" page,

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and then you can return to the "WordPress Updates."

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You can see now there are no plugins that need updated.

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The themes that come with default install of WordPress can be updated,

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and you will see this message that the site is in "Maintenance mode."

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If somebody happens to go to your website during this time,

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they will see a message that the site is being placed in "Maintenance mode" for an upgrade[br]

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and will be available shortly.

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Usually it just takes a few seconds up to a few minutes,

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depending on the speed of your server.

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So returning to the Updates page, you will see that everything is up to date now.

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And point releases and security releases are very important to update,

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as well as plugins and themes updates.[br]