collectstatic error in Django 1.10 Windows 10, root is specified. Where to "dig"?

Question

Django

Django is based on python3.4 (32bit), but versions 3.5 give the same thing.
Error traceback:

Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "C:\Users\user\Envs\fp\lib\site-packages\django\core\management\__init__.py", line 367, in execute_from_command_line
    utility.execute()
  File "C:\Users\user\Envs\fp\lib\site-packages\django\core\management\__init__.py", line 359, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Users\user\Envs\fp\lib\site-packages\django\core\management\base.py", line 305, in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:\Users\user\Envs\fp\lib\site-packages\django\core\management\base.py", line 356, in execute
    output = self.handle(*args, **options)
  File "C:\Users\user\Envs\fp\lib\site-packages\django\contrib\staticfiles\management\commands\collectstatic.py", line 193, in handle
    collected = self.collect()
  File "C:\Users\user\Envs\fp\lib\site-packages\django\contrib\staticfiles\management\commands\collectstatic.py", line 124, in collect
    handler(path, prefixed_path, storage)
  File "C:\Users\user\Envs\fp\lib\site-packages\django\contrib\staticfiles\management\commands\collectstatic.py", line 347, in copy_file
    self.storage.save(prefixed_path, source_file)
  File "C:\Users\user\Envs\fp\lib\site-packages\django\core\files\storage.py", line 54, in save
    return self._save(name, content)
  File "C:\Users\user\Envs\fp\lib\site-packages\django\core\files\storage.py", line 357, in _save
    locks.unlock(fd)
  File "C:\Users\user\Envs\fp\lib\site-packages\django\core\files\locks.py", line 86, in unlock
    ret = UnlockFileEx(hfile, 0, 0, 0xFFFF0000, byref(overlapped))
ctypes.ArgumentError: argument 5: <class 'TypeError'>: expected LP_OVERLAPPED instance instead of pointer to OVERLAPPED

Answer 1

https://msdn.microsoft.com/en-us/library/windows/d...
apparently some file is already locked OS
Fix for Windows standard

Answer 2

do not engage in nonsense to develop on Windows!! Linux in virtualbox and fight!