C:\Program Files\Electrum-1.9.8>python setup.py install
Traceback (most recent call last):
  File "setup.py", line 20, in <module>
    usr_share = os.getenv("XDG_DATA_HOME", os.path.join(os.getenv("HOME"), ".local", "share"))
  File "C:\Python27\lib\ntpath.py", line 64, in join
    result_drive, result_path = splitdrive(path)
  File "C:\Python27\lib\ntpath.py", line 94, in splitdrive
    if p[1:2] == ':':
TypeError: 'NoneType' object has no attribute '__getitem__'