The file I used should be an MSDN source of Professional SP1. Specifically when trying to test the resulting ISO on VMware workstation, it comes up with this error: "The product key entered does not match any of the Windows images available for installation. Enter a different product key." When using VMware's Easy Install, it bypasses this error, but windows fails to load after install. As you can see from my last.ini i didn't add any unattended settings, or remove Manual Install. After searching these seem to be the most likely causes of this error but aren't the case. Did I make a mistake removing a component, or did I get an altered .ISO file? Last Session.ini