Revert "Bug 1837530 - [2/2] doc: drive-by typo & old-OS removal r=sylvestre"

This reverts commit f8a240f.

Author: K4sum1

toolkit/content/neterror/supportpages/time-errors.html

@@ -149,7 +149,7 @@ <h1 id="w_set-your-system-clock-to-the-correct-time">
         >
       </p>
       <div class="for" data-for="win10">
-        <h2>If you are on Windows 10:</h2>
+        <h2>if you are on Windows 10:</h2>
         <ol>
           <li>
             Click the Windows Start button or press the Windows key<span
@@ -175,8 +175,68 @@ <h2>If you are on Windows 10:</h2>
           <li>If you are done with your changes, close the Settings window.</li>
         </ol>
       </div>
+      <div class="for" data-for="win8">
+        <h2>if you are on Windows 8:</h2>
+        <ol>
+          <li>
+            From the Start Screen, click the <strong>Desktop</strong> tile. The
+            Desktop view will open.
+          </li>
+          <li>
+            From the Desktop, hover in the lower right-hand corner to access the
+            Charms.
+          </li>
+          <li>
+            Select <span class="menu">Control Panel</span> from the
+            <span class="menu">Settings</span> charm. The Control Panel window
+            will open.
+            <dl>
+              <dd></dd>
+            </dl>
+          </li>
+          <li>
+            In the Control Panel window, click on
+            <strong>Clock, Language, and Region</strong> and then
+            <strong>Date and Time</strong>.
+          </li>
+          <li>
+            The panel that opens shows the current date and time settings. To
+            change your settings click the
+            <span class="button">Change date and time</span> or
+            <span class="button">Change time zone</span> button.
+          </li>
+          <li>To confirm your changes click <span class="button">OK</span>.</li>
+        </ol>
+      </div>
+      <div class="for" data-for="win7">
+        <h2>if you are on Windows 7:</h2>
+        <ol>
+          <li>
+            Click the Windows Start button or press the Windows key
+            <span class="key"></span>.
+          </li>
+          <li>
+            In the Start Menu, click <span class="menu">Control Panel</span>.
+            <dl>
+              <dd></dd>
+            </dl>
+          </li>
+          <li>
+            In the Control Panel window, click on
+            <strong>Clock, Language, and Region</strong> and then
+            <strong>Date and Time</strong>.
+          </li>
+          <li>
+            The panel that opens shows the current date and time settings. To
+            change your settings click the
+            <span class="button">Change date and time</span> or
+            <span class="button">Change time zone</span> button.
+          </li>
+          <li>To confirm your changes click <span class="button">OK</span>.</li>
+        </ol>
+      </div>
       <div class="for" data-for="mac">
-        <h2>If you are on Mac OS:</h2>
+        <h2>if you are on Mac OS:</h2>
         <ol>
           <li>
             Click the Apple menu and select