As far as I can determine, it's not a Windows thing because I have autoinsert disabled on every drive. The first thing I do when installing an o/s is tweak everything, ESPECIALLY autoplay, via Tweakui and manual methods. I even tried disabling it in all my drives via the registry. Rebooted and created an image file in drive "I", closed ImgBurn and moved the same disc over to drive "J" -- still the same message errors and lock-up, despite having all my source drives readily read. It's a real puzzle because every other image & burn program I have behaves normally, regardless of how many different drives I use.
I'll keep searching for a solution...and let you know when/if I find one. In the meantime, rebooting or using the same drive for multiple DVDs is my only option.