diff --git a/app/images/windows.svg b/app/images/windows.svg
new file mode 100644
index 00000000..270405c7
--- /dev/null
+++ b/app/images/windows.svg
@@ -0,0 +1,85 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Generator: Adobe Illustrator 19.1.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   version="1.1"
+   id="svg2"
+   inkscape:export-ydpi="90"
+   inkscape:export-xdpi="90"
+   sodipodi:docname="windows.svg"
+   inkscape:export-filename="/home/ossman/devel/noVNC/images/drag.png"
+   inkscape:version="0.92.3 (2405546, 2018-03-11)"
+   x="0px"
+   y="0px"
+   viewBox="-293 384 25 23"
+   xml:space="preserve"
+   width="25"
+   height="23"><metadata
+   id="metadata21"><rdf:RDF><cc:Work
+       rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
+         rdf:resource="http://purl.org/dc/dcmitype/StillImage" /><dc:title></dc:title></cc:Work></rdf:RDF></metadata><defs
+   id="defs19" /><sodipodi:namedview
+   pagecolor="#ffffff"
+   bordercolor="#666666"
+   borderopacity="1"
+   objecttolerance="10"
+   gridtolerance="10"
+   guidetolerance="10"
+   inkscape:pageopacity="0"
+   inkscape:pageshadow="2"
+   inkscape:window-width="1920"
+   inkscape:window-height="1017"
+   id="namedview17"
+   showgrid="false"
+   inkscape:pagecheckerboard="true"
+   inkscape:zoom="9.44"
+   inkscape:cx="-0.84745763"
+   inkscape:cy="12.5"
+   inkscape:window-x="2552"
+   inkscape:window-y="122"
+   inkscape:window-maximized="1"
+   inkscape:current-layer="svg2" />
+<style
+   type="text/css"
+   id="style2">
+	.st0{fill:#FFFFFF;}
+</style>
+<g
+   id="g14"
+   transform="matrix(1.2624869,0,0,1.3601695,73.614445,-144.84322)">
+	<g
+   id="g12">
+		<path
+   class="st0"
+   d="m -277.4,396 c -0.7,0 -1.3,0 -2,0 -0.4,0 -0.5,-0.1 -0.5,-0.5 0,-1 0,-2 0,-3 0,-0.3 0.2,-0.5 0.5,-0.5 1.3,-0.1 2.6,-0.3 3.9,-0.4 0.4,0 0.7,0.1 0.7,0.6 0,1.1 0,2.2 0,3.3 0,0.4 -0.2,0.6 -0.6,0.6 -0.7,-0.1 -1.4,-0.1 -2,-0.1 z"
+   id="path4"
+   inkscape:connector-curvature="0"
+   style="fill:#ffffff" />
+		<path
+   class="st0"
+   d="m -274.9,399.3 c 0,0.6 0,1.1 0,1.7 0,0.4 -0.1,0.6 -0.6,0.6 -1.4,-0.1 -2.8,-0.3 -4.1,-0.4 -0.3,0 -0.4,-0.3 -0.4,-0.5 0,-1 0,-2 0,-3 0,-0.4 0.2,-0.5 0.6,-0.5 1.3,0 2.6,0 3.9,0 0.5,0 0.6,0.2 0.6,0.6 0,0.4 0,0.9 0,1.5 z"
+   id="path6"
+   inkscape:connector-curvature="0"
+   style="fill:#ffffff" />
+		<path
+   class="st0"
+   d="m -283.5,396 c -0.6,0 -1.3,0 -1.9,0 -0.4,0 -0.6,-0.1 -0.6,-0.6 0,-0.8 0,-1.5 0,-2.3 0,-0.4 0.2,-0.6 0.6,-0.7 1.3,-0.1 2.7,-0.3 4,-0.4 0.4,0 0.5,0.1 0.5,0.5 0,1 0,1.9 0,2.9 0,0.4 -0.2,0.5 -0.5,0.5 -0.8,0.1 -1.5,0.1 -2.1,0.1 z"
+   id="path8"
+   inkscape:connector-curvature="0"
+   style="fill:#ffffff" />
+		<path
+   class="st0"
+   d="m -283.5,397 c 0.6,0 1.3,0 1.9,0 0.4,0 0.6,0.1 0.6,0.5 0,1 0,1.9 0,2.9 0,0.4 -0.2,0.5 -0.5,0.5 -1.3,-0.1 -2.7,-0.3 -4,-0.4 -0.4,0 -0.6,-0.2 -0.6,-0.7 0,-0.7 0,-1.5 0,-2.2 0,-0.5 0.2,-0.7 0.7,-0.7 0.6,0.1 1.2,0.1 1.9,0.1 z"
+   id="path10"
+   inkscape:connector-curvature="0"
+   style="fill:#ffffff" />
+	</g>
+</g>
+</svg>
\ No newline at end of file
diff --git a/app/ui.js b/app/ui.js
index 3c99beb8..9daa689d 100644
--- a/app/ui.js
+++ b/app/ui.js
@@ -280,6 +280,8 @@ const UI = {
             .addEventListener('click', UI.toggleExtraKeys);
         document.getElementById("noVNC_toggle_ctrl_button")
             .addEventListener('click', UI.toggleCtrl);
+        document.getElementById("noVNC_toggle_windows_button")
+            .addEventListener('click', UI.toggleWindows);
         document.getElementById("noVNC_toggle_alt_button")
             .addEventListener('click', UI.toggleAlt);
         document.getElementById("noVNC_send_tab_button")
@@ -1526,6 +1528,17 @@ const UI = {
         }
     },
 
+    toggleWindows() {
+        const btn = document.getElementById('noVNC_toggle_windows_button');
+        if (btn.classList.contains("noVNC_selected")) {
+            UI.rfb.sendKey(KeyTable.XK_Super_L, "MetaLeft", false);
+            btn.classList.remove("noVNC_selected");
+        } else {
+            UI.rfb.sendKey(KeyTable.XK_Super_L, "MetaLeft", true);
+            btn.classList.add("noVNC_selected");
+        }
+    },
+
     toggleAlt() {
         const btn = document.getElementById('noVNC_toggle_alt_button');
         if (btn.classList.contains("noVNC_selected")) {
diff --git a/vnc.html b/vnc.html
index dc608a26..e23e0038 100644
--- a/vnc.html
+++ b/vnc.html
@@ -134,6 +134,9 @@
                     <input type="image" alt="Alt" src="app/images/alt.svg"
                         id="noVNC_toggle_alt_button" class="noVNC_button"
                         title="Toggle Alt"/>
+                    <input type="image" alt="Windows" src="app/images/windows.svg"
+                        id="noVNC_toggle_windows_button" class="noVNC_button"
+                        title="Toggle Windows"/>
                     <input type="image" alt="Tab" src="app/images/tab.svg"
                         id="noVNC_send_tab_button" class="noVNC_button"
                         title="Send Tab"/>