fails to install visual studio build tools and stays stuck at not installing Python

[watery]

I just tried to install:

npm install -g windows-build-tools

from an elevated command prompt, and I'm seeing this:

Starting installation...
Launched installers, now waiting for them to finish.
This will likely take some time - please be patient!

Status from the installers:
---------- Visual Studio Build Tools ----------
    at Object.<anonymous> (C:\Program Files (x86)\Microsoft Visual Studio\Installer\resources\app\main\StubMain.js:4:675902)
    at __webpack_require__ (C:\Program Files (x86)\Microsoft Visual Studio\Installer\resources\app\main\StubMain.js:4:128)
    at Object.defineProperty.value (C:\Program Files (x86)\Microsoft Visual Studio\Installer\resources\app\main\StubMain.js:4:283293)
    at __webpack_require__ (C:\Program Files (x86)\Microsoft Visual Studio\Installer\resources\app\main\StubMain.js:4:128)
    at Object.defineProperty.value (C:\Program Files (x86)\Microsoft Visual Studio\Installer\resources\app\main\StubMain.js:4:743)
------------------- Python --------------------
Python 2.7.17 is already installed, not installing again.

And it waits there forever. I tried with an elevated PowerShell too, but the result is the same.

I then tried installing 4.0.0 as suggested in this comment and installation worked fine.

Then I retried installing the latest version:

npm install --global --production windows-build-tools

npm WARN deprecated [email protected]: request has been deprecated, see https://github.com/request/request/issues/3142

> [email protected] postinstall [...]\.windows-build-tools\AppData\Roaming\npm\node_modules\windows-build-tools
> node ./dist/index.js



Downloading vs_BuildTools.exe
[>                                            ] 0.0% (0 B/s)
Downloaded vs_BuildTools.exe. Saved to [...]\.windows-build-tools\vs_BuildTools.exe.

Starting installation...
Launched installers, now waiting for them to finish.
This will likely take some time - please be patient!

Status from the installers:
---------- Visual Studio Build Tools ----------
2020-04-29T15:11:28 : Error : Retrying attempted connection to service 'Installer' - attempt '4'
2020-04-29T15:11:28 : Error : Retrying attempted connection to service 'ProductsProvider' - attempt '4'
2020-04-29T15:11:28 : Error : Non è stato trovato alcun prodotto corrispondente ai parametri seguenti: channelId:  VisualStudio.15.Release productId:  Microsoft.VisualStudio.Product.BuildTools
2020-04-29T15:11:28 : Verbose : Closing installer. Return code: 1.
2020-04-29T15:12:28 : Error : App cleanup rejected with an error: Timed out during application cleanup.
------------------- Python --------------------
Python 2.7.17 is already installed, not installing again.


Could not install Visual Studio Build Tools.
Please find more details in the log files, which can be found at
[...]\.windows-build-tools

Skipping configuration: No configuration for Python or Visual Studio Build Tools required.

All done!

+ [email protected]
added 1 package from 1 contributor and updated 7 packages in 33.412s

[watery]

I just saw the warning about the .NET Framework 4.5.1 on the homepage and I'm on Windows 7 with only v4 installed.

But I needed this package to install the private npm proxy registry Verdaccio, which seems to start, so I'm fine so far.