I was on with HP tech in chat and she was close, but on wrong device. Here is the procedure that corrected my problem:
Goto Control Panel->System->Hardware->Device Manager.
Click on View, choose devices by connection.
Expand the ATI IDE Controller
Expand the Primary IDE Channel
Make sure ATAPI DVD A DH16AYH is listed under the expanded IDE Controller.
Double Click the Primary IDE Channel
Click on Advanced Settings Tab
Change the transfer mode for Device 0 from “DMA if available” to "PIO only"
I am back to normal use of the Cd drive now. Thanks for any assistance, tips, knowledge, etc. rendered. Much appreciated !