diff --git a/coriolis/osmorphing/windows.py b/coriolis/osmorphing/windows.py
index 9f303c5b..eb7d9d37 100644
--- a/coriolis/osmorphing/windows.py
+++ b/coriolis/osmorphing/windows.py
@@ -512,7 +512,7 @@ def _install_cloudbase_init(self, download_url,
 
             self._event_manager.progress_update("Installing cloudbase-init")
             self._expand_archive(cloudbaseinit_zip_path,
-                                 cloudbaseinit_base_dir)
+                                 cloudbaseinit_base_dir, overwrite=False)
 
             log_dir = "%s\\Log" % cloudbaseinit_base_dir
             self._conn.exec_ps_command("mkdir '%s' -Force" % log_dir,
diff --git a/coriolis/tests/osmorphing/test_windows.py b/coriolis/tests/osmorphing/test_windows.py
index a570b8ac..79664a9e 100644
--- a/coriolis/tests/osmorphing/test_windows.py
+++ b/coriolis/tests/osmorphing/test_windows.py
@@ -551,7 +551,8 @@ def test__install_cloudbase_init(
             "%sWindows\\System32\\config\\SYSTEM" % self.os_root_dir)
 
         mock_expand_archive.assert_called_once_with(
-            cloudbaseinit_zip_path, cloudbaseinit_base_dir)
+            cloudbaseinit_zip_path, cloudbaseinit_base_dir,
+            overwrite=False)
 
         self.conn.exec_ps_command.assert_called_once_with(
             "mkdir '%s' -Force" %
@@ -625,7 +626,8 @@ def test_install_cloudbase_init_existing_service(
             "HKLM\\%s" % mock_uuid4.return_value,
             "%sWindows\\System32\\config\\SYSTEM" % self.os_root_dir)
         mock_expand_archive.assert_called_once_with(
-            cloudbaseinit_zip_path, cloudbaseinit_base_dir)
+            cloudbaseinit_zip_path, cloudbaseinit_base_dir,
+            overwrite=False)
         self.conn.exec_ps_command.assert_called_once_with(
             "mkdir '%s' -Force" %
             ("%s\\Log" % cloudbaseinit_base_dir),