Movie slows playback like slow motion

[skorpinok]

hi, i've been decrypting dvd movies using dvd fab 7 decrypter & watch them using power dvd 10 without any problem. but recently when i watch the plays fine for an hour then starts freezing, i installed norton antivirus & uninstalled mcafee for my sony vaio. is it a norton problem or any settings in power dvd 10? please help.

thanks

[Baldrick]

Have you tried play with something else? Try vlc media player.