Install chocolatey behind proxy with system settings in Internet Explorer.

Install-Chocoaltey

$wc=new-object net.webclient
$wp=[system.net.WebProxy]::GetDefaultProxy()
$wp.UseDefaultCredentials=$true
$wc.Proxy=$wp
iex ($wc.DownloadString('https://chocolatey.org/install.ps1'))

This worked for me:

@PowerShell -NoProfile -ExecutionPolicy unrestricted -Command "$wc=new-object net.webclient; $wp=[system.net.WebProxy]::GetDefaultProxy(); $wp.UseDefaultCredentials=$true; $wc.Proxy=$wp; iex ($wc.DownloadString('https://chocolatey.org/install.ps1'))" && SET PATH=%PATH%;%systemdrive%\chocolatey\bin

What @dazzag24 said worked perfectly for me

for me too, thanks!

Someone should provide the trick to the CHOCOLATERY Website rather in this quite obscure page (thanks to Google). It works like a charm. I suppose this trick also work with no proxy at all. Tested on Windows7 32 bits.

Once you're happy with guide from @dazzag24, set http_proxy, https_proxy and chocolateyProxyLocationenvironment variable for your proxy location