Python 3.6 Installation

Michael Torrie torriem at
Wed Jan 18 16:49:11 EST 2017

On 01/18/2017 10:59 AM, eryk sun wrote:
> On Wed, Jan 18, 2017 at 6:23 AM, Terry Reedy <tjreedy at> wrote:
>> Not everyone has run Windows update since the current runtime was released.
> Python's installer tries (and sometimes fails) to install the
> KB2999226 update, which installs an old version of the Universal CRT.
> Some installers instead bundle the VC++ redistributable, which
> includes KB2999226, but that would be overkill for CPython. I thought
> we could phase this out in 3.6 to instead require an up-to-date OS. If
> people need offline updates, as opposed to using Windows update, it's
> better to get the most recent version directly from Microsoft,
> KB3118401 [1]. Steve Dower disagreed, and that's the end of it.
> As to the loader returning STATUS_INVALID_IMAGE_FORMAT (0xC000007B), I
> would run the executable/script under a debugger such as WinDbg or
> cdb, with loader snaps enabled via gflags. Find the troublesome
> DLL(s), and manually resolve the problem.
> [1]:

Thanks for the clarifications, Erik. Appreciate it.

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