Problems with sound when watching dvd, stuttering sound

Hi,

I'm having problems with my sound, i am getting a stuttering sound more and more frequently when watching videos online/dvds.

I have tried going into the device manager and updating my drivers in the sound section, but apparently they are up-to-date. Really don't know what to do next!

I have a Toshiba laptop, satellite series. I've had no joy on that website with support. I am using Windows 7.

Any ideas?!

Thanks!