Howdy JimH. Thanks for your reply.
The drive is a Pioneer BDR-XD05B, connected via a USB 3.0 cable. The B of XD05B denotes the color black and is unimportant. The drive supports BDXL, Blu-ray, DVD, and CD media. Up until the Windows 10 Fall creators update, DVDs played flawlessly using JRiver Media Center.
I've tried searching the Internet for solutions, including Tom's Hardware
www.tomshardware.com/ and Windows Secrets
https://windowssecrets.com/forums/I may have spoken too soon about installing the latest GeForce driver 388.13. DVDs now play in Media Center, albeit not perfectly. DVDs take a long time to load, and there is still some stuttering while loading a DVD into MC, but once loaded, DVDs play normally. Prior to the GeForce update, on the rarer occasion that I could get a DVD to load, trying to switch to a different scene selection would crash MC and cause the DVD to continually spin in the drive. If instead of trying to select a scene, I could click fast forward to the next scene repeatedly until I got to the scene I wanted, and the DVD would play. Since the GeForce update, scene selecting works normally, as do other controls.