Update Windows download popup and list for 3.9. (#1611) (#1655)

Author: ned-deily

templates/downloads/os_list.html

@@ -38,8 +38,12 @@ <h2>Stable Releases</h2>
                     {% for r in releases %}
                     <li>
                         <a href="{{ r.get_absolute_url }}">{{ r.name }} - {{ r.release_date|date }}</a>
-                        {% if os.slug == 'windows' and r.name >= 'Python 3.5' %}
-                        <p><strong>Note that {{ r.name }} <em>cannot</em> be used on Windows XP or earlier.</strong></p>
+                        {% if os.slug == 'windows' %}
+                            {% if r.name >= 'Python 3.9' %}
+                            <p><strong>Note that {{ r.name }} <em>cannot</em> be used on Windows 7 or earlier.</strong></p>
+                            {% elif r.name >= 'Python 3.5' %}
+                            <p><strong>Note that {{ r.name }} <em>cannot</em> be used on Windows XP or earlier.</strong></p>
+                            {% endif %}
                         {% endif %}
                         <ul>
                             {% for f in r.files.all %}

templates/downloads/supernav.html

@@ -10,7 +10,7 @@ <h4>Download for {{ data.os.name }}</h4>
         <p>
             <a class="button" href="{{ data.python3.url }}">{{ data.python3.release.name }}</a>
         </p>
-        {% if data.os.slug == 'windows' %}<p><strong>Note that Python 3.5+ <em>cannot</em> be used on Windows XP or earlier.</strong></p>{% endif %}
+        {% if data.os.slug == 'windows' %}<p><strong>Note that Python 3.9+ <em>cannot</em> be used on Windows 7 or earlier.</strong></p>{% endif %}
         <p>Not the OS you are looking for? Python can be used on many operating systems and environments. <a href="{% url 'download:download' %}">View the full list of downloads</a>.</p>
     </div>
     {% endfor %}