diff --git a/extras/openslides_gui/gui.py b/extras/openslides_gui/gui.py
old mode 100644
new mode 100755
index 296ee2a8f..427c105c7
--- a/extras/openslides_gui/gui.py
+++ b/extras/openslides_gui/gui.py
@@ -21,10 +21,10 @@ import openslides
 from openslides.utils.main import (
     detect_openslides_type,
     filesystem2unicode,
+    unicode2filesystem,
     get_default_user_data_path,
     get_port,
-    get_win32_portable_path,
-    PortableDirNotWritable
+    PortableDirNotWritable,
 )
 
 
@@ -97,11 +97,7 @@ class RunCommandControl(wx.Panel):
 
         # XXX: subprocess on windows only handles byte strings
         #      with python3 this will hopefully no longer be the case
-        fs_encoding = sys.getfilesystemencoding() or sys.getdefaultencoding()
-        cmd = [
-            x.encode(fs_encoding) if isinstance(x, unicode) else x
-            for x in cmd
-        ]
+        cmd = [unicode2filesystem(x) for x in cmd]
 
         creationflags = getattr(subprocess, "CREATE_NEW_PROCESS_GROUP", 0)
         self.child_process = subprocess.Popen(
diff --git a/openslides/global_settings.py b/openslides/global_settings.py
index e72824234..6de07d99b 100644
--- a/openslides/global_settings.py
+++ b/openslides/global_settings.py
@@ -5,7 +5,7 @@ import os
 from django.utils.translation import ugettext_lazy
 
 from openslides.utils.main import filesystem2unicode
-from openslides.utils.plugins import get_plugins_from_entry_points
+from openslides.utils.plugins import collect_plugins
 
 SITE_ROOT = os.path.realpath(os.path.dirname(__file__))
 
@@ -129,4 +129,4 @@ HAYSTACK_CONNECTIONS = {
 HAYSTACK_SIGNAL_PROCESSOR = 'haystack.signals.RealtimeSignalProcessor'
 
 # Adds all automaticly collected plugins
-INSTALLED_PLUGINS = get_plugins_from_entry_points()
+INSTALLED_PLUGINS = collect_plugins()
diff --git a/openslides/utils/plugins.py b/openslides/utils/plugins.py
old mode 100644
new mode 100755
index d494de0f8..56efa564c
--- a/openslides/utils/plugins.py
+++ b/openslides/utils/plugins.py
@@ -1,8 +1,18 @@
 # -*- coding: utf-8 -*-
 
+import pkgutil
+import os
+import sys
+
 from django.utils.importlib import import_module
 from pkg_resources import iter_entry_points
 
+from openslides.utils.main import (
+    detect_openslides_type,
+    WINDOWS_PORTABLE_VERSION,
+    get_win32_portable_user_data_path,
+)
+
 plugins = {}
 
 
@@ -15,6 +25,30 @@ def get_plugins_from_entry_points():
     return tuple(entry_point.module_name for entry_point in iter_entry_points('openslides_plugins'))
 
 
+def get_plugins_from_path(path):
+    """
+    Collects all modules/packages in the given `path`
+    and returns a tuple of their names
+    """
+    importer = pkgutil.get_importer(path)
+    return tuple(x[0] for x in importer.iter_modules())
+
+
+def collect_plugins():
+    """Collect all plugins that can be automatically discovered."""
+    plugins = get_plugins_from_entry_points()
+
+    # add all modules in plugins/ dir of portable automatically
+    if detect_openslides_type() == WINDOWS_PORTABLE_VERSION:
+        plugins_path = os.path.join(
+            get_win32_portable_user_data_path(), "plugins")
+        if plugins_path not in sys.path:
+            sys.path.append(plugins_path)
+        plugins += get_plugins_from_path(plugins_path)
+
+    return plugins
+
+
 def get_plugin(plugin):
     """
     Returns the imported module. The plugin argument must be a python dotted