Remove Platform version helpers and use <VersionHelpers.h> per http://msdn.microsoft.com/en-us/library/windows/desktop/dn424972%28v=vs.85%29.aspx

Installer/DialogInstall.cpp

@@ -22,7 +22,6 @@
 #include "Resource.h"
 #include "Util.h"
 #include "../Common/ControlTemplate.h"
-#include "../Common/Platform.h"
 
 #define APPNAME L"Rainmeter"
 
@@ -176,7 +175,7 @@ INT_PTR CDialogInstall::OnInitDialog(WPARAM wParam, LPARAM lParam)
 
 	item = GetControl(Id_InstallButton);
 	SendMessage(m_Window, WM_NEXTDLGCTL, (WPARAM)item, TRUE);
-	if (Platform::IsAtLeastWinVista() && !Util::IsProcessUserAdmin())
+	if (IsWindowsVistaOrGreater() && !Util::IsProcessUserAdmin())
 	{
 		Button_SetElevationRequiredState(item, TRUE);
 	}
@@ -211,7 +210,7 @@ INT_PTR CDialogInstall::OnNotify(WPARAM wParam, LPARAM lParam)
 void CDialogInstall::LaunchInstallProcess()
 {
 	const bool isProcsesUserAdmin = Util::IsProcessUserAdmin();
-	if (!isProcsesUserAdmin && (Platform::IsAtLeastWinVista() && !Util::CanProcessUserElevate()))
+	if (!isProcsesUserAdmin && (IsWindowsVistaOrGreater() && !Util::CanProcessUserElevate()))
 	{
 		MessageBox(
 			m_Window,

Installer/Installer.vcxproj

@@ -32,7 +32,6 @@
   <ItemGroup>
     <ClCompile Include="..\Common\ControlTemplate.cpp" />
     <ClCompile Include="..\Common\Dialog.cpp" />
-    <ClCompile Include="..\Common\Platform.cpp" />
     <ClCompile Include="Application.cpp" />
     <ClCompile Include="DialogInstall.cpp" />
     <ClCompile Include="Install.cpp" />

Installer/Installer.vcxproj.filters

@@ -81,9 +81,6 @@
     <ClCompile Include="DialogInstall.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
-    <ClCompile Include="..\Common\Platform.cpp">
-      <Filter>Common</Filter>
-    </ClCompile>
     <ClCompile Include="..\Common\ControlTemplate.cpp">
       <Filter>Common</Filter>
     </ClCompile>

Installer/StdAfx.h

@@ -26,6 +26,7 @@
 #include <shlobj.h>
 #include <shlwapi.h>
 #include <wininet.h>
+#include <VersionHelpers.h>
 
 #include <stdlib.h>
 #include <malloc.h>