What OS are you using? There is no operational downside to using Nero, but VSO is an integral part of DVDFab and normally works smoothly, and the excellent customer support at VSO will help you nail this down if you want. Here is a link to their support page, where you can download a small program called vsorep.exe that will gather system information and burn logs for submission. Just click here–>http://www.vso-software.fr/contactform.php?topic=technical to get started. In the meantime you might try experimenting with the I/O Control settings in Common Settings–>Read, changing from “Auto” to “SPTI” and “ASPI”. Hope you can get this worked out. And please post back if you get it resolved so that other users can enjoy the benefits of your legwork.
@maineman Didn’t see you standing there, pard. Guess we are thinking along the same lines, lol.