Amazon has been actively developing AWS Tools for PowerShell. You can download the latest release from the PowerShell Gallery.
Install the latest module with the following command (v3.3.428.0 was the latest at the time of writing this):
Install-Module -Name "AWSPowerShell" -RequiredVersion 3.3.428.0
By default, PowerShell modules are copied to C:\Program Files\WindowsPowerShell\Modules