Installation script fails with old powershell versions

[WilliamHPNielsen]

Apparently, Invoke-WebRequest fails on (ancient) powershell versions older than major version 3. The installation script could check the version and warn.

[jenshnielsen]

Looks like this is the default on windows 7 but you can upgrade

https://blogs.technet.microsoft.com/heyscriptingguy/2014/11/09/weekend-scripter-install-powershell-4-0-in-windows-7/

[Dominik-Vogel]

Anytime we run into this situation on a lab computer we should consider updating windows not the powershell.

[Dominik-Vogel]

I will integrate a check like this:
https://stackoverflow.com/questions/1825585/determine-installed-powershell-version

Source for webrequest:
https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/invoke-webrequest?view=powershell-6