python3.4 pip install does not work properly

Fatal error in launcher: Job information querying failed

python -m pip install pytest

Traceback (most recent call last):

  File "C:\Python34\lib\site-packages\pip\_vendor\lockfile\linklockfile.py", lin

e 30, in acquire

OSError: [WinError 50] ERROR_NOT_SUPPORTED - The request is not supported: 'c:\\

documents and settings\\administrator\\local settings\\application data\\pip\\ca

che\\http\\f\\e\\d\\0\\e\\REACTOS-WS7Q0UZ-394.956-69823585' -> 'c:\\documents an

d settings\\administrator\\local settings\\application data\\pip\\cache\\http\\f

\\e\\d\\0\\e\\fed0ed508030b766d5b0c2792132c8bf197804464765b46b361f93a4.lock'

Traceback (most recent call last):

  File "C:\Python34\lib\runpy.py", line 170, in _run_module_as_main

    "__main__", mod_spec)

  File "C:\Python34\lib\runpy.py", line 85, in _run_code

    exec(code, run_globals)

  File "C:\Python34\lib\site-packages\pip\__main__.py", line 19, in <module>

    sys.exit(pip.main())

  File "C:\Python34\lib\site-packages\pip\__init__.py", line 217, in main

    return command.main(cmd_args)

  File "C:\Python34\lib\site-packages\pip\basecommand.py", line 229, in main

    pip_version_check(session)

  File "C:\Python34\lib\site-packages\pip\utils\outdated.py", line 126, in pip_v

ersion_check

    headers=\{"Accept": "application/json"},

  File "C:\Python34\lib\site-packages\pip\_vendor\requests\sessions.py", line 47

3, in get

    return self.request('GET', url, **kwargs)

  File "C:\Python34\lib\site-packages\pip\download.py", line 365, in request

    return super(PipSession, self).request(method, url, *args, **kwargs)

  File "C:\Python34\lib\site-packages\pip\_vendor\requests\sessions.py", line 46

1, in request

    resp = self.send(prep, **send_kwargs)

  File "C:\Python34\lib\site-packages\pip\_vendor\requests\sessions.py", line 61

0, in send

    r.content

  File "C:\Python34\lib\site-packages\pip\_vendor\requests\models.py", line 730,

 in content

    self._content = bytes().join(self.iter_content(CONTENT_CHUNK_SIZE)) or bytes

()

  File "C:\Python34\lib\site-packages\pip\_vendor\requests\models.py", line 655,

 in generate

    for chunk in self.raw.stream(chunk_size, decode_content=True):

  File "C:\Python34\lib\site-packages\pip\_vendor\requests\packages\urllib3\resp