Visual Studio unable to download installation files

Question

I simply wish to install Visual Studio 2017 to compile a project.

Trying to install via the installer obtained from Microsoft fails after being unable to obtain the .opc file from aka.ms (found that after checking logs in %Temp%)

Moved to a full install version with all files and .opc file present. Installer still attempts to download from the web. Fails saying it is unable to download.

Tried running installed with --layout pointing toward the location of the offline files, same error.

Installed certificates from the certificates folder both in Personal and Trusted Root stores, no difference.

Tried starting CNG Key Isolation service, fails with error 1053

Microsoft support transferred me three times before saying the problem is on their end, so how, if one were to have no internet connection and evidently has all files required for install available, install this, if the installer stubbornly attempts to download from the web?

Is there a KB I am missing or some procedure I have to follow with the full installers?

Answer 1

In my case it is the network firewall blocking the downloading because the downloading involve not only main Microsoft visual studio site which is allowed in our network but also some url like https://aka.ms which is blocked by our firewall.the error is listed in c:\users\myusername\appdata\local\temp\dd_bootstrapper_xxx.log