Server2019.ps1

Download-WindowsServer2019.ps1

Function Download-WindowsServer2019
{
    [CmdLetBinding()]Param(
        [Parameter(Position=0,Mandatory=$True)][String]$Path)

        $Current = [Net.ServicePointManager]::SecurityProtocol
        [Net.ServicePointManager]::SecurityProtocol = 3072
        Import-Module BITSTransfer

        $Image          = "17763.379.190312-0539.rs5_release_svc_refresh_SERVER_EVAL_x64FRE_en-us.iso"
        $2019           = @{

            Source      = "https://software-download.microsoft.com/download/sg/$Image"
            Destination = "$Path\$Image"
            Description = "Downloading Windows Server 2019 Evaluation" 
        }

        Start-BitsTransfer @2019
        [Net.ServicePointManager]::SecurityProtocol = $Current
}

When Hyper-V tells you that "the ISO hash value is incorrect"... ^ and you know this code is correct?

Well that's what security is all about. Finding out that the MANUFACTURER might have to 'unhack' things like 'the BIOS'.