I have a problem with the sound on a Toshiba Satellite Pro A300. Although all the correct sound drivers are installed, the volume turned up and not muted. The only thing that will play is a small quick time movie saved to the local desktop.
The operating system is Windows XP SP3.
All critical updates and services packs are applied.
The soundcard is a RealTek HD Audio.
Thanks in advance for your help on this matter.