<#
    .SYNOPSIS
    Updates the running Windows machine.
#>
function Update-WindowsInstallation {
    <#
        Runs the Windows update loop.
    #>
    function Start-UpdateLoop {
        Write-Host "Preparing for Windows Update";
        $null = Import-Module PSWindowsUpdate;
    
        while (((Get-WindowsUpdate -IgnoreReboot).Count -gt 0)) {
            Write-Host "There are updates available.";
            Write-Host "Installing updates";
    
            try {
                $null = Install-WindowsUpdate -AcceptAll -IgnoreReboot -ErrorAction "SilentlyContinue";
            }
            catch { }
    
            if ((Get-WURebootStatus -Silent)) {
                Write-Information "A Reboot is Required!";
                Write-Information "Windows will reboot now and the installation will be continued automatically.";
                return;
            }
        } else {
            Write-Information "Upgrading Windows finished successfully!";
            return;
        }
    }

    Start-UpdateLoop;
}