i live in australia and i bought stuart little 3 on dvd and i had same problem... dvd disc would play in set top dvd player but when i tried to play it on pc the dvd would just skip/attempt to read then nothing..... Also a Sony pictures movie .....

its a copy protection :-(

nothing can copy it ... unless u run it thru a set top dvd player hooked up to a dvd recorder or similar....

also u dont have any spyware on your pc from this dvd as the pc cant read it no matter what ..... sony put spyware on their music cd's .. but they got in big trouble for that.. anyways try and reboot your pc with that dvd disc in drive... i bet your computer wont reboot until you remove disc from drive.... happened to me...

your only option would be to contact sony complaining that you always play dvd music thru your pc and its having problems on set top player as well ... Sony will then realise that alot of people are having same problem and hopefully not put this protection on their dvd releases..

look here...
http://club.cdfreaks.com/showthread.php?t=163620