[qanda]This question is published in the hardware section for the Optiarc AD-7540A. Click here to view full specs.[/qanda]Under Windows Vista SP1 (original), does not works. It noticed driver missing. I cannot find driver anywhere. Bad product.
Welcome to the Forum.
Optiarc AD-7540A â€œDriverâ€ is part of and included in the Windows Vista Operating System.
Perhaps the below Microsoft Vista Knowledge Base Web Links will be helpful in correcting your problem ->