Hi JLC. I'm Greg, an installation specialist, 10 year Windows MVP, and Guardian Moderator here to help you.
You can get a Blu Ray Player from Microsoft store here:
https://www.microsoft.com/en-us/p/blu-ray-playe...
There's more about this in this fuller discussion here:
https://www.windowscentral.com/how-watch-blu-ra...
I hope this helps. Feel free to ask back any questions and keep me posted. I will keep working with you until it's resolved.
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