I had the same problem a few weeks ago.... well only worse ; during burning process it would stop and reboot the pc.
I should say that I did update my BIOS a few days earlier but it was by the book with the Asus EZ BIOS update utility. So then I updated the firmware for my Aopen CDrw drive. The problem persisted.
Finally i decided to do a system restore operation on my pc ; the first ever on my work pc
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. Fortunately it did solve the problem whatever it had been... Yes, I did do virus scans and the whole lot ; nothing. Anway, all works fine again now.