diff --git a/mercurial/context.py b/mercurial/context.py
--- a/mercurial/context.py
+++ b/mercurial/context.py
@@ -27,6 +27,8 @@ class changectx(object):
             self._rev = changeid
             self._node = repo.changelog.node(changeid)
             return
+        if isinstance(changeid, long):
+            changeid = str(changeid)
         if changeid == '.':
             self._node = repo.dirstate.p1()
             self._rev = repo.changelog.rev(self._node)
diff --git a/mercurial/win32.py b/mercurial/win32.py
--- a/mercurial/win32.py
+++ b/mercurial/win32.py
@@ -5,7 +5,6 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
-import encoding
 import ctypes, errno, os, struct, subprocess, random
 
 _kernel32 = ctypes.windll.kernel32
@@ -290,8 +289,8 @@ def lookupreg(key, valname=None, scope=N
             if res != _ERROR_SUCCESS:
                 continue
             if type.value == _REG_SZ:
-                # never let a Unicode string escape into the wild
-                return encoding.tolocal(buf.value.encode('UTF-8'))
+                # string is in ANSI code page, aka local encoding
+                return buf.value
             elif type.value == _REG_DWORD:
                 fmt = '<L'
                 s = ctypes.string_at(byref(buf), struct.calcsize(fmt))