RaiderRed,
Have things played ok before, or have you just started using LW & found that nothing plays?

Try changing your default player to something else...same problem?

What formats are the files that won't play?

Is sound ok on your computer? Does CD playback work?

Did you preview any of the tracks that won't play while you were downloading them?

Is it only downloaded tracks that won't play, or is it also files that you've added yourself?