Application cannot be frozen with PyInstaller on Windows

[r0x0r]

The culprit is the win32com.shell import. See pyinstaller/pyinstaller#1322 for more details. There is currently no resolution for this problem on the PyInstaller end.

One workaround is to remove this import and the related code (see win32.py, lines 182-186). win32com.shell functionality is required by open folder dialog. So if you don't use it, this will do the trick.

[r0x0r]

Fixed in the master of pyinstaller.