dvd player cannot play some dvds; says "dvd decrypter missing"
I have a thinkpad with an ibm cd-rw/dvd player. It will play some dvds; others identify the disk but will not play; then the message is that a dvd decrypter is missing. The difference seems to be that a recent dvd will not play, but older ones -- at least the content is older -- play without a problem. The video program on the machine just says "movie player." Any ideas?