3.8 on win7 installer won't run

Python Help
1

python-3.8.0-amd64.exe won’t run.
Can I extract python-3.8.2-embed-amd64.zip and copy it over 3.7?

2

Does the installer fail with an error message? Python 3.8.10 (x64 installer) was the last version that supported Windows 7. But the OS needs KB2533623 to support the required LOAD_LIBRARY_ flags and AddDllDiectory().

No, 3.8 is not a drop-in replacement for 3.7. Many extension modules (i.e. PYD files in Windows) require a specific Python DLL (e.g. “python37.dll” or “python38.dll”) and will fail to load if it’s not the required version of Python. Also, the embedded distributions are not intended to work as a standalone interpreter. The nuget distributions, on the other hand, are standalone and meant to be deployed without registering as a system Python, typically for continuous integration testing.

3

Hi Eryk,
Thank you for your msg.
I found Windows6.1-KB3063858-x64.msu on an old reddit,
which allowed me to install python-3.8.0-amd64.exe,
which shows in REVO as 3.8.150.0;
I don’t know what that leaves us with.

4

KB2533623 was indeed superseded by KB3063858 (Windows 7 x64 download from Microsoft, dated 2015-06-02). One can also install the more recent rollup update KB4457144 (Windows 7 x64 download from Microsoft, dated 2018-09-11). I recommend the latter if you’re concerned with keeping your Windows 7 system updated in general, but the rollup update is a lot more than is needed for just Python 3.8.

You should upgrade to 3.8.10 (i.e. DLL version 3.8.10150.1013). Look over the resolved issues in the changelog from 3.8.1 to 3.8.10.