what laptop do you have? Has it always run "commercial DVD's" before?
by "tried several dvd players" I guess you mean DVD software players? Are all these installed on your machine?
Possibly a killer question do you own a Sony laptop?
Huawei P10 review
1995-2015: How technology has changed the world in 20 years
An overview: What leading creative agencies are doing to improve diversity
New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.