One of my students installed Python 3.5 on Windows 10 to default location where user name "Łukasz" contains unicode.

Now "-m venv" and "-m ensurepip" do not work:

C:\Users\Łukasz>C:\Users\Łukasz\AppData\Local\Programs\Python\Python35-32\python.exe -m venv workshops
Error: Command '['C:\\Users\\\u0141ukasz\\workshops\\Scripts\\python.exe', '-Im', 'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit status 1

C:\Users\Łukasz>C:\Users\Łukasz\AppData\Local\Programs\Python\Python35-32\python.exe -m ensurepip
Traceback (most recent call last):
  File "C:\Users\\u0141ukasz\AppData\Local\Programs\Python\Python35-32\lib\runpy.py", line 170, in _run_module_as_main
    "__main__", mod_spec)
  File "C:\Users\\u0141ukasz\AppData\Local\Programs\Python\Python35-32\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Users\\u0141ukasz\AppData\Local\Programs\Python\Python35-32\lib\ensurepip\__main__.py", line 4, in <module>
    ensurepip._main()
  File "C:\Users\\u0141ukasz\AppData\Local\Programs\Python\Python35-32\lib\ensurepip\__init__.py", line 209, in _main
    default_pip=args.default_pip,
  File "C:\Users\\u0141ukasz\AppData\Local\Programs\Python\Python35-32\lib\ensurepip\__init__.py", line 116, in bootstrap
    _run_pip(args + [p[0] for p in _PROJECTS], additional_paths)
  File "C:\Users\\u0141ukasz\AppData\Local\Programs\Python\Python35-32\lib\ensurepip\__init__.py", line 40, in _run_pip
    import pip
  File "<frozen importlib._bootstrap>", line 969, in _find_and_load
  File "<frozen importlib._bootstrap>", line 954, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 896, in _find_spec
  File "<frozen importlib._bootstrap_external>", line 1136, in find_spec
  File "<frozen importlib._bootstrap_external>", line 1112, in _get_spec
  File "<frozen importlib._bootstrap_external>", line 1093, in _legacy_get_spec
  File "<frozen importlib._bootstrap>", line 444, in spec_from_loader
  File "<frozen importlib._bootstrap_external>", line 530, in spec_from_file_location
UnicodeEncodeError: 'mbcs' codec can't encode characters in position 0--1: invalid character