diff --git a/ext_open/util.py b/ext_open/util.py
index a3ab663..8ce862a 100644
--- a/ext_open/util.py
+++ b/ext_open/util.py
@@ -1,10 +1,13 @@
+from config import config
 from ctypes import windll
-import datetime
+from itertools import starmap
 from pydoc import pager
+import datetime
 import os
 import re
-from config import config
 windows_path = re.compile(r"[a-zA-Z]\:(\\[^/\\?\%\*\:\|\"\<\>]+)+")
+windows_part = re.compile(r'(^[a-z]:\\|[a-zA-Z]\:\\|[^/\\\?\%\*\:|\"\<\>]+)')
+# unix_part = re.compile(r'(^/|[^\x00/]+)')
 # https://stackoverflow.com/a/827397
 def is_admin():
     return windll.shell32.IsUserAnAdmin() != 0
@@ -19,8 +22,9 @@ def get_drives():
         bitmask >>= 1
 
     return drives
+
 def no_parents(paths):
-    paths = sorted(paths,key=len)
+    paths = sorted(map(path_split,paths),key=len)
     ret = []
     paths
     while len(paths) > 0:
@@ -30,9 +34,16 @@ def no_parents(paths):
         paths = []
         for path in old_paths:
 
-            if not path.startswith(el1):
+            if not startswith(path,el1):
                 paths.append(path)
-    return ret
+    return list(starmap(os.path.join,ret))
+
+def startswith(a,b):
+    l = len(b)
+    return a[:l] == b
+
+def path_split(path):
+    return windows_part.findall(path)
 
 def abbreviate(path,n=72,min_path = 2):
     if len(path) > n: