diff --git a/www/help/how-to-use-our-ebooks.php b/www/help/how-to-use-our-ebooks.php
index 10e7c7b9..b79e93a3 100644
--- a/www/help/how-to-use-our-ebooks.php
+++ b/www/help/how-to-use-our-ebooks.php
@@ -37,7 +37,7 @@ require_once('Core.php');
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 							<p>If you downloaded the Kindle cover thumbnail, now navigate to your Kindle’s <code class="path">system</code> folder.</p>
-							<p><i><strong>If you don’t see a <code class="path">system</code> folder when your Kindle is plugged in</strong>, you may have to tell your computer to show hidden system files. For instructions on how to do that, <a href="http://windows.microsoft.com/en-us/windows/show-hidden-files">see here for Windows</a> or <a href="https://www.lifewire.com/display-hidden-files-in-os-x-153332">see here for Mac</a>.</i></p>
+							<p><i>If you don’t see a <code class="path">system</code> folder when your Kindle is plugged in, you may have to tell your computer to show hidden system files. If you’re using Windows, you may also have to show protected operating system files. To do that, see <a href="https://www.howtogeek.com/howto/windows-vista/show-hidden-files-and-folders-in-windows-vista/">these instructions for Windows</a> and <a href="https://www.lifewire.com/display-hidden-files-in-os-x-153332">these instructions for Mac</a>.</i></p>
 							<p>Once you’re in the <code class="path">system</code> folder, find the <code class="path">thumbnails</code> folder and drag and drop the thumbnail into there.</p>
 							<p><em>Make sure to copy the thumbnail <strong>after</strong> copying the azw3 ebook file.</em> Due to a bug in the Kindle software, your Kindle will use a default cover for your ebook if you don’t copy the thumbnail file over. <a href="https://www.amazon.com/help/">Complain to Amazon.</a></p>
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