Hi Chris,
I have a total clean installation of Win 8.1 64bit Enterprise Edition. and de edvs2012_222.exe still does not install. All others do install edvs2012_221.exe and also es2012_222.exe. I have made a full report in an rtf document. I can send it to you. I also addressed the problem to Aldo Clerici of MicroFocus who is hired by ING to support the mainframe migration process.
Peter.