Keeping AzureRM PowerShell cmdlets up to date

Microsoft has been updating the AzureRM PowerShell cmdlets on a nearly monthly basis. To keep them up to date on your PC uninstall the old version(s) then install the newest version.
First, open PowerShell as an Administrator.

Uninstall old verion(s):
Get-InstalledModule -Name "AzureRM" -AllVersions | Uninstall-Module

In the command above we first find all installed versions of the AzureRM cmdlets, then pipe that into Uninstall-Module to remove the module. Install newest module:
Install-Module -Name "AzureRM"

If you get the warning message:

Untrusted repository You are installing the modules from an untrusted repository. If you trust this reposito InstallationPolicy value by running the Set-PSRepository cmdlet. Are y
ou sure you want 'PSGallery'? [Y] Yes [A] Yes to All [N] No [L] No to All [S] Suspend [?] Help (default is "N"):

You can prevent this in the future by running:
Set-PSRepository -Name PSGallery -InstallationPolicy Trusted