Can't run python on windows anymore

Question

Since the most recent update to Windows 10, I have been seeing this message every time I try to do anything with Python

I have reinstalled it, tried running it as administrator. Nothing works.

Answer 1

First make sure that python.exe exists in the given directory and that its not a zero-length file. More likely though is that you installed the wrong version of python. Make sure you download and install the x86 version as it will work on both 64-bit and x86 systems. Do a full uninstall and install python via the Windows x86 MSI installer.

Edit:

If this doesn't work please provide more information on which specific Windows 10 version you are running and which python installer you are using.

Edit 2:

You can also get more information from the Windows Event Log

Answer 2

I think the reason is that python.exe has size 0 Kb. It could happen because you (and me too) didn't exit from Python correctly. The way to fix the issue is to re-install Python or download "portable" version: https://www.python.org/downloads/release/python-385/ By the way, one of the way to exit from python (v3) in Windows:

>>> import sys
>>> sys.exit()

Answer 3

I've also had "This app can't run on your PC" windows 10 dialog box starting to appear after I tried to start x64 app from python script under x86 python.

Uninstalled x86 python, installed x64 python and all started to work normal.