Thnaks for reply my question. No, they are in an external HDD. Is weird is that if I hit play I can see them, but as soon as I decide to mpve forward or backward or change chapters it freezes in 90% of the times, and have to go to the task manager and there I can see that the program " is not responding" . Remeber, this happens only with regular ripped dvds, not blurays that palys perfect.