Sorry, here are the details.

[Oscar Benjamin]

Please reply to the list rather than directly to me (and then you will
get a quicker response from someone else).

On 25 February 2016 at 17:13, Giriprasadh Raghavan
<giriprasadhraghavan at gmail.com> wrote:
> I open the setup file of python 3.5.1 and click then install button. Then I
> am displayed an error that says:
>
> One or more issues caused the setup to fail. Please fix the issues an then
> retry the setup. For more info see the log file.
>
> 0x80070570 – The file or directory is corrupted and unreadable.
>
> (I actually downloaded it for the 3rd time as it said the file or directory
> is corrupted and unreadable.)

This problem (0x80070570) has been reported a few times:

https://mail.python.org/pipermail/python-list/2015-September/697447.html
https://mail.python.org/pipermail/python-list/2016-January/702590.html
https://mail.python.org/pipermail/python-list/2015-December/700998.html

However I haven't seen a fix for it. It is apparently due to problems
with corrupted files or with broken hard disks or something. I don't
remember hearing of this problem before Python 3.5 and AFAIK it only
occurs with 3.5.

Could you try installing 3.4 and let us know if that works? If so it
may be a bug (I don't see any tracker issues for it yet).

--
Oscar