This is the initial (and importantly) error message - but it's not one you should be seeing.
I'm inclined to say this could be driver related.
What SATA controller is the drive attached to?
Right click the drive selection box and click 'Family Tree'. Close the prompt and copy + paste the info from the log window.
edit: oops, took too long to reply
Ok, thanks for replying guys.
Just to advise you... I have done a few changes...
I have now updated to latest drive firmware...
I have now physically disconnected my original DVD-Writer drive, so that now there is only ONE signle Optical drive on my pc - the new Blu-Ray Writer.
I have updated to the latest ImgBurn version.
I will now re-try, but fully expect to make yet another coaster. Just for additional info, I have a Quad Core Pentium, with 4GB of Ram, and I close down all none essential programs and background stuff using Task Manager/Processes, before attempting a burn, just to rule out any other issues. Finally, I cannot update to Win 7 SP1, as I am one of the rare few for whom the install fails, and all the relevant MS KB articles relating to this are to no avail - I simply cannot get SP1 to install for me no matter what I try.
So here goes trying this again, but this time with new firmware, only one optical drive attached to my PC, and with latest version of ImgBurn...
I'll let you know how it goes...