Check variables:
[System.Environment]::GetEnvironmentVariable("HTTP_PROXY","user");
[System.Environment]::GetEnvironmentVariable("HTTPS_PROXY","user");
[System.Environment]::GetEnvironmentVariable("HTTPS_PROXY","user");
[System.Environment]::GetEnvironmentVariable("HTTP_PROXY","user");
Set variable:
setx https_proxy http://<your_proxy_name_or_IP>:3128/
