Index: src/org/openstreetmap/josm/tools/PlatformHookWindows.java
===================================================================
--- src/org/openstreetmap/josm/tools/PlatformHookWindows.java	(revision 19041)
+++ src/org/openstreetmap/josm/tools/PlatformHookWindows.java	(working copy)
@@ -316,7 +316,7 @@
     private static String buildOSBuildNumber() {
         StringBuilder sb = new StringBuilder();
         try {
-            sb.append(getProductName());
+            sb.append(Utils.strip(getSystemProperty("os.name")));
             String displayVersion = getDisplayVersion();
             if (displayVersion != null) {
                 sb.append(' ').append(displayVersion);