Have you tried installing on a different computer? Also, are you loading everything? I haven't installed in awhile but there are choices to install a basic set and I think a complete set without the alternate tools (mallets & rods I think?). Anyway, these are just more opportunities to run into issues so you may want to try a simplified installation while you are working it out with TOONTRACK. If you bought the disks locally you shouldn't have a problem getting replacements because the disks have no value-it's the registration that they "sell" you.