(#1031) Update wording for setting variable

Updates the wording to give a few options for setting the environment
variable. Adds information for how to verify it has been set.

Author: corbob

src/content/docs/en-us/choco/setup.mdx

@@ -714,7 +714,9 @@ See <Xref title="Installing Chocolatey Behind a Proxy Server" value="proxy-setti
 
 ### Installing to a different location
 
-The Chocolatey installation script looks for the `ChocolateyInstall` environment variable in order to identify where it should install to. If this environment varialbe does not exist, it will install Chocolatey to the default location. In order to install to a non-default location, you should set this variable in a way that it is available in the process that will be running the install script.
+The Chocolatey installation script looks for the `ChocolateyInstall` environment variable in order to identify where it should install to. If this environment variable does not exist, it will install Chocolatey to the default location. In order to install to a non-default location, you should set this variable in a way that it is available in the process that will be running the install script. For example you could set the environment variable through the [Windows GUI](https://www.howtogeek.com/787217/how-to-edit-environment-variables-on-windows-10-or-11/), or you could use `setx`](https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/setx).
+
+You can validate that PowerShell has the environment variable by running: `Write-Host $env:ChocolateyInstall`
 
 1. Create an environment variable named `ChocolateyInstall` and set it to the folder you want Chocolatey to install to prior to installation.
 1. Don't use `"C:\Chocolatey"` unless necessary.