Cannot detect video DVD in the DVD-ROM drive

[AllIn7MC]

Hi,

I am looking for advice on this error:
"Windows Media Center cannot detect a video DVD in the DVD-ROM drive. Insert a video DVD into the drive."

It worked fine 2-3 weeks ago, and I don't recall making changes to anything, although it is possible I changed the autoplay options,
because I prefer to use WMC over the default (Cyberlink Power DVD player).

A general internet search on this error has not given me any useful results.

The drive is a Blu-ray drive with a DVD in it. The DVD movie plays just fine on this computer using CyberLink power DVD and I can use
file explorer to examine the folders on the disk.

Thanks!