After installing roundup I get the following error message when I start
up PythonWin

 File
"C:\Python25\Lib\site-packages\pythonwin\pywin\framework\intpyapp.py",
line 181, in InitInstance
    import interact
  File
"C:\Python25\Lib\site-packages\pythonwin\pywin\framework\interact.py",
line 22, in <module>
    import pywin.scintilla.IDLEenvironment
  File
"C:\Python25\Lib\site-packages\pythonwin\pywin\scintilla\IDLEenvironment.py",
line 54, in <module>
    GetIDLEModule("AutoIndent").IndentSearcher.readline = fast_readline
  File
"C:\Python25\Lib\site-packages\pythonwin\pywin\scintilla\IDLEenvironment.py",
line 24, in GetIDLEModule
    __import__(modname)
  File
"C:\Python25\Lib\site-packages\pythonwin\pywin\idle\AutoIndent.py", line
503, in <module>
    import tokenize
  File "C:\Python25\Lib\tokenize.py", line 38, in <module>
    COMMENT = N_TOKENS
<type 'exceptions.NameError'>: name 'N_TOKENS' is not defined

Deleting the folder: C:\Python25\Lib\site-packages\roundup fixes the
problem.