Disable audio notifications on Windows 7 and lower

ts/test/types/Settings_test.ts

@@ -23,6 +23,21 @@ describe('Settings', () => {
     });
 
     context('on Windows', () => {
+      context('version 7', () => {
+        beforeEach(() => {
+          sandbox.stub(process, 'platform').value('win32');
+          sandbox.stub(os, 'release').returns('7.0.0');
+        });
+
+        afterEach(() => {
+          sandbox.restore();
+        });
+
+        it('should return false', () => {
+          assert.isFalse(Settings.isAudioNotificationSupported());
+        });
+      });
+
       context('version 8+', () => {
         beforeEach(() => {
           sandbox.stub(process, 'platform').value('win32');

ts/types/Settings.ts

@@ -1,4 +1,6 @@
 import * as OS from '../OS';
 
+const MIN_WINDOWS_VERSION = '8.0.0';
+
 export const isAudioNotificationSupported = () =>
-  OS.isWindows() || OS.isMacOS();
+  OS.isWindows(MIN_WINDOWS_VERSION) || OS.isMacOS();