Install Chocolatey (choco) on Windows

On administrator command line prompt run the following command:

@powershell -NoProfile -ExecutionPolicy Bypass -Command "iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))" && SET "PATH=%PATH%;%ALLUSERSPROFILE%\chocolatey\bin"


From PowerShell:

Set-ExecutionPolicy Bypass
iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))


To upgrade Chocholatey:
choco upgrade chocolatey