Remove proxy settings from the windows command prompt

try,

set http_proxy=
set https_proxy=

From an elevated command prompt (CMD or PS) type:

netsh winhttp reset proxy

This should produce:

C:\Windows\system32>netsh winhttp reset proxy Current WinHTTP proxy settings: Direct access (no proxy server).

This command will reset your proxy settings and as you can see by the output, they will be set to "no proxy server."

You can also type netsh winhttp show proxy to see what your current settings are.