diff -Nru os-prober-1.51ubuntu2/debian/changelog os-prober-1.51ubuntu3/debian/changelog
--- os-prober-1.51ubuntu2/debian/changelog	2012-04-04 17:30:51.000000000 +0000
+++ os-prober-1.51ubuntu3/debian/changelog	2012-04-04 22:34:57.000000000 +0000
@@ -1,3 +1,11 @@
+os-prober (1.51ubuntu3) precise; urgency=low
+
+  * When called with WINOSDATA, return the list of Windows partitions
+    containing the system instead of only listing these containing the
+    bootrecord. (LP: #772470)
+
+ -- Stéphane Graber <stgraber@ubuntu.com>  Wed, 04 Apr 2012 18:34:56 -0400
+
 os-prober (1.51ubuntu2) precise; urgency=low
 
   * Add support for Windows 8.
diff -Nru os-prober-1.51ubuntu2/os-probes/mounted/x86/20microsoft os-prober-1.51ubuntu3/os-probes/mounted/x86/20microsoft
--- os-prober-1.51ubuntu2/os-probes/mounted/x86/20microsoft	2012-04-04 17:18:05.000000000 +0000
+++ os-prober-1.51ubuntu3/os-probes/mounted/x86/20microsoft	2012-04-04 18:28:53.000000000 +0000
@@ -100,6 +100,29 @@
 	found=true
 fi
 
+
+# Restrict to partitions containing the OS
+if [ -n "$WINOSDATA" ]; then
+    found=
+    if [ -d "$2/ProgramData/Microsoft/Windows/Start Menu/Programs/StartUp" ]; then
+        long=${long:-"Windows 8 (data)"}
+        short=${short:-"Windows"}
+        found=true
+    elif [ -d "$2/ProgramData/Microsoft/Windows/Start Menu/Programs/Startup" ]; then
+        long=${long:-"Windows 7 (data)"}
+        short=${short:-"Windows"}
+        found=true
+    elif [ -d "$2/Documents and Settings/All Users/Start Menu/Programs/Startup" ]; then
+        long=${long:-"Windows XP/Vista (data)"}
+        short=${short:-"Windows"}
+        found=true
+    elif [ -d "$2/Winnt/Profiles/All Users/Start Menu/Programs/Startup" ]; then
+        long=${long:-"Windows NT (data)"}
+        short=${short:-"Windows"}
+        found=true
+    fi
+fi
+
 if [ -z "$found" ]; then
 	exit 1
 fi