diff --git a/tryton/common/common.py b/tryton/common/common.py
index 48f546b18b..fa724ff92f 100644
--- a/tryton/common/common.py
+++ b/tryton/common/common.py
@@ -58,8 +58,7 @@ class TrytonIconFactory(gtk.IconFactory):
                 continue
             try:
                 pixbuf = gtk.gdk.pixbuf_new_from_file(
-                        os.path.join(PIXMAPS_DIR, fname).decode(
-                        sys.getfilesystemencoding()))
+                        os.path.join(PIXMAPS_DIR, fname).decode('utf-8'))
             except Exception:
                 continue
             icon_set = gtk.IconSet(pixbuf)
@@ -105,7 +104,7 @@ class TrytonIconFactory(gtk.IconFactory):
             with os.fdopen(fileno, 'w') as svgfile:
                 svgfile.write(icon['icon'])
             pixbuf = gtk.gdk.pixbuf_new_from_file(path.decode(
-                sys.getfilesystemencoding()))
+                sys.getfilesystemencoding().encode('utf-8')))
             os.remove(path)
             iconset = gtk.IconSet(pixbuf)
             self.add(icon['name'], iconset)
@@ -308,7 +307,7 @@ def file_selection(title, filename='', parent=None,
         filename = win.get_preview_filename()
         try:
             pixbuf = gtk.gdk.pixbuf_new_from_file_at_size(filename.decode(
-                sys.getfilesystemencoding()), 128, 128)
+                sys.getfilesystemencoding().encode('utf-8')), 128, 128)
             img.set_from_pixbuf(pixbuf)
             have_preview = True
         except Exception:
diff --git a/tryton/config.py b/tryton/config.py
index e79696db14..a72d1c4e9f 100644
--- a/tryton/config.py
+++ b/tryton/config.py
@@ -175,8 +175,13 @@ class ConfigManager(object):
             self.defaults.get(key)))
 
 CONFIG = ConfigManager()
-CURRENT_DIR = os.path.abspath(os.path.normpath(os.path.join(
-    os.path.dirname(__file__), '..')))
+if os.name == 'nt' and hasattr(sys, 'frozen'):
+    CURRENT_DIR = os.path.dirname(unicode(sys.executable,
+        sys.getfilesystemencoding()))
+else:
+    CURRENT_DIR = os.path.abspath(os.path.normpath(os.path.join(
+        unicode(os.path.dirname(__file__), sys.getfilesystemencoding()),
+        '..')))
 PREFIX = os.path.abspath(os.path.normpath(os.path.join(
     os.path.dirname(sys.argv[0]), '..')))
 PIXMAPS_DIR = os.path.join(CURRENT_DIR, 'share', 'pixmaps', 'tryton')
@@ -188,8 +193,7 @@ if not os.path.isdir(PIXMAPS_DIR):
         PIXMAPS_DIR = os.path.join(PREFIX, 'share', 'pixmaps', 'tryton')
 
 TRYTON_ICON = gtk.gdk.pixbuf_new_from_file(
-        os.path.join(PIXMAPS_DIR, 'tryton-icon.png').decode(
-            sys.getfilesystemencoding()))
+        os.path.join(PIXMAPS_DIR, 'tryton-icon.png').encode('utf-8'))
 
 def _data_dir():
     data_dir = os.path.join(CURRENT_DIR, 'share', 'tryton')
diff --git a/tryton/gui/window/dblogin.py b/tryton/gui/window/dblogin.py
index 444c291225..76465d86fa 100644
--- a/tryton/gui/window/dblogin.py
+++ b/tryton/gui/window/dblogin.py
@@ -10,7 +10,6 @@ import re
 import gettext
 import threading
 import time
-import sys
 
 from tryton.version import VERSION
 import tryton.common as common
@@ -371,7 +370,7 @@ class DBLogin(object):
         self.dialog.set_default_response(gtk.RESPONSE_OK)
         image = gtk.Image()
         image.set_from_file(os.path.join(PIXMAPS_DIR,
-            'tryton.png').decode(sys.getfilesystemencoding()))
+            'tryton.png').decode('utf-8'))
         image.set_alignment(0.5, 1)
         ebox = gtk.EventBox()
         ebox.modify_bg(gtk.STATE_NORMAL, gtk.gdk.color_parse("#1b2019"))