I would just deactivate that for now.
Are you upgrading from XP? In this case you might have installed such a driver, maybe even not for a real device, but for a virtual cd rom (as maybe in Alcohol120% or Daemon Tools).
In any case, I would do a clean install, not an upgrade.
When I tried to install Windows Vista Ultimate, it would not let me continue until I updated the driver for VAX347S SCSI Controller. I've searched everywhere online and I can't find an update. What (if any) are my options? What is the VAX347S SCSI Controller? What would happen if I disabled it and then tried to install Vista? I've searched the Microsoft site and found others with the same problem, but no one seems to have an answer for it. I paid a lot for Vista Ultimate and I really want to install it. Can anyone help?

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