[Tutor] Trouble Launching Python

eryk sun eryksun at gmail.com
Tue Dec 20 13:52:28 EST 2016

On Mon, Dec 19, 2016 at 10:38 PM, Joseph Olugbohunmi via Tutor
<tutor at python.org> wrote:
> Hello,Good day, I installed Python 3.5.2 on my Windows 8.1 PC and then I tried launching
> IDLE as well as the Interpreter but I got a message that api-ms-win-crt-runtime-l1-1-0.dll was
> missing. I downloaded and installed that after which I got another message that
> api-ms-win-crt-math-l1-1-0.dll was also missing, I got that, and then another dll was missing
> and it goes on and on. Please what can I do?

The implementation of Python that you're using is written in C and
relies on the C runtime library to provide a measure of cross-platform
portability. The latest C runtime from Microsoft is called the
"Universal CRT". It's an operating system component. As such, you
should already have ucrtbase.dll and all of the API set DLLs, such as
api-ms-win-crt-runtime-l1-1-0.dll, assuming your system is up to date
via Windows Update. If for some reason your system doesn't have this
update, you can manually download and install it from the following


Install either "Windows8.1-KB3118401-x64.msu" (64-bit) or
"Windows8.1-KB3118401-x86.msu" (32-bit), depending on whether your
version of Windows is 64-bit or 32-bit.

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