Fix #102: unfortunately QL does not run on Windows 10 S

QuickLook/App.xaml.cs

@@ -59,6 +59,14 @@ namespace QuickLook
 
         private void Application_Startup(object sender, StartupEventArgs e)
         {
+            if (ProcessHelper.IsOnWindows10S())
+            {
+                MessageBox.Show("This application does not run on Windows 10 S.");
+
+                Shutdown();
+                return;
+            }
+
             EnsureFirstInstance();
 
             if (!_isFirstInstance)

QuickLook/Helpers/ProcessHelper.cs

@@ -16,6 +16,7 @@
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 using System;
+using System.Diagnostics.CodeAnalysis;
 using System.Threading.Tasks;
 using QuickLook.NativeMethods;
 
@@ -46,5 +47,17 @@ namespace QuickLook.Helpers
                 return false;
             }
         }
+
+        [SuppressMessage("ReSharper", "InconsistentNaming")]
+        public static bool IsOnWindows10S()
+        {
+            const uint PRODUCT_CLOUD = 0x000000B2; // Windows 10 S
+            const uint PRODUCT_CLOUDN = 0x000000B3; // Windows 10 S N
+
+            Kernel32.GetProductInfo(Environment.OSVersion.Version.Major,
+                Environment.OSVersion.Version.Minor, 0, 0, out var osType);
+
+            return osType == PRODUCT_CLOUD || osType == PRODUCT_CLOUDN;
+        }
     }
 }

QuickLook/NativeMethods/Kernel32.cs

@@ -32,5 +32,9 @@ namespace QuickLook.NativeMethods
 
         [DllImport("kernel32.dll")]
         internal static extern IntPtr GetCurrentThreadId();
+
+        [DllImport("kernel32.dll")]
+        internal static extern bool GetProductInfo(int dwOSMajorVersion, int dwOSMinorVersion, int dwSpMajorVersion,
+            int dwSpMinorVersion, out uint pdwReturnedProductType);
     }
 }