I live in the UK and have been using my computer to play Region 1 (American) DVDs. I just insert the DVD into the player and the opening frame of the DVD appears and I press Play. Recently a friend gave me several Region 1 DVDs. Some of them worked perfectly well, but when I inserted the others nothing happened. These played with no trouble on my friend's computer, but, like me, he knows nothing about computers so could not tell me what might be wrong. What do you think?
Thank you very much.
