Sound isn't working at all

My God. I've had so many problems this week wihtm y computer you wouldn't beleive!

This time my sound isn't working AT ALL! And i don't have a clue what to do...

Tried: Volume Control, Updating Sound Card Drivers, Device Conflicts, Default device etc

Don't know what to do now....anyone?

Thanks, Josh

(XP SP2)

{{UPDATE}}

The problem was a conflict between my brothers and my ipods using last.fm, (something i'll tell them) they were conflicting or something.....