diff --git a/se/qt/app.py b/se/qt/app.py
index 3859a5f8..77a78f3e 100644
--- a/se/qt/app.py
+++ b/se/qt/app.py
@@ -6,12 +6,22 @@
 # Copyright 2009 Hardcoded Software (http://www.hardcoded.net)
 
 from dupeguru import data
+from dupeguru.directories import Directories as DirectoriesBase, STATE_EXCLUDED
 
 from base.app import DupeGuru as DupeGuruBase
 from details_dialog import DetailsDialog
 from preferences import Preferences
 from preferences_dialog import PreferencesDialog
 
+class Directories(DirectoriesBase):
+    ROOT_PATH_TO_EXCLUDE = frozenset(['windows', 'program files'])
+    def _default_state_for_path(self, path):
+        result = DirectoriesBase._default_state_for_path(self, path)
+        if result is not None:
+            return result
+        if len(path) == 2 and path[1].lower() in self.ROOT_PATH_TO_EXCLUDE:
+            return STATE_EXCLUDED
+
 class DupeGuru(DupeGuruBase):
     LOGO_NAME = 'logo_se'
     NAME = 'dupeGuru'
@@ -21,6 +31,10 @@ class DupeGuru(DupeGuruBase):
     def __init__(self):
         DupeGuruBase.__init__(self, data, appid=4)
     
+    def _setup(self):
+        self.directories = Directories()
+        DupeGuruBase._setup(self)
+    
     def _update_options(self):
         DupeGuruBase._update_options(self)
         self.scanner.min_match_percentage = self.prefs.filter_hardness