Hi,
As per your previous discussion with Bill Smithers, Windows 8.1 and Windows 8.1 Pro doesn't come with DVD movie playback capability. However, you can search for a DVD player app in the Microsoft Store.
Another option that you may want to consider is to upgrade to Windows 10. Please note that The Windows DVD Player app enables Windows 10 PCs with an optical disc drive to play DVD movies. If you have the Windows 10 Anniversary update, you may avail the 7-day free trial to check your device's compatibility with the DVD player and then buy it to enjoy full viewing experience:
You may use the link provided below as your reference should you decide proceed with the upgrade:
Let us know if you need further assistance.