Dear PCR,
Yes, all Microsoft updates are current. I tried the fixes outlined in the article Janeane sent. I removed elbycdio.sys. I have been to the MSI site on a regular basis and have updated the bios to the latest posted and verified that I am using the latest versions of all drivers and firmware...
This is really a head-scratcher for me as well. I cannot see where something might be preventing DVD playback. On the odd chance that it was a SATA issue (some posts indicate that the optical drive will not work when connected to a secondary port), I tried the USB optical drive. In all cases, CDs play fine but DVDs will not mount.
I really did try everything that I could think of or was aware of before pestering the folks here...
Is there anything else you can think of?
Thanks,
Mike