Windows version detection taken from https://chocolatey.org/packages/PowerShell/

powershell-windows-version-detection.ps1

$osVersion = (Get-WmiObject Win32_OperatingSystem).Version
$os = (Get-WmiObject "Win32_OperatingSystem")
    switch ([version]$osVersion) {
	{($_ -ge [version]"6.0") -AND ($_ -le [version]"6.0.6001")} {
		Write-Output "OS is Vista or 2008"
	}
	{($_ -eq [version]"6.1.7600")} {
		Write-Output "OS is Win7 or Server 2008 R2 (NON-SP1)"
	}
	{($_ -ge [version]"6.1.7601") -AND ($_ -lt [version]"6.2")} {
		Write-Output "OS is Win7 (SP1 or later) or Server 2008 R2 (SP1 or later)"
	}
	{($_ -ge [version]"6.2.9200") -AND ($_ -lt [version]"6.3")} {
		if($os.ProductType -eq 3) {
			Write-Output "OS is Server 2012"
		}
		else {
			Write-Output "OS is Win 8 (not 8.1)"
		}
	}
	{($_ -ge [version]"6.3.9600") -AND ($_ -lt [version]"6.4")} {
		Write-Output "OS is Win8.1 Server 2012 R2"
	}
	{($_ -ge [version]"6.4") -or ($_ -ge [version]"10.0")} {
		Write-Output "OS is Windows 10"
	}
	default { 
		# Windows XP, Windows 2003, Windows Vista, or unknown?
		throw "Unknown older operating system (Windows XP, Windows 2003, Windows Vista, or ?)."
	}
}