Index: /trunk/src/VBox/Installer/win/VirtualBox.wxs
===================================================================
--- /trunk/src/VBox/Installer/win/VirtualBox.wxs	(revision 58570)
+++ /trunk/src/VBox/Installer/win/VirtualBox.wxs	(revision 58571)
@@ -65,5 +65,5 @@
     <Property Id="NETWORKTYPE" Value="NDIS6" Secure="yes"/>
     <!-- Force NDIS5 on pre-Vista -->
-    <SetProperty Id="NETWORKTYPE" After="CostFinalize" Value="NDIS5"><![CDATA[VersionNT < 600]]></SetProperty>
+    <SetProperty Id="NETWORKTYPE" After="CostFinalize" Value="NDIS5"><![CDATA[(NETWORKTYPE="NDIS6") AND (VersionNT < 600)]]></SetProperty>
 
     <!-- Install the product for all users on the system -->