Hello
New drivers, but I don't know where to find them.
You can find the drivers on Toshiba European driver download page:
http://eu.computers.toshiba-europe.com > Support & Downloads > Download Drivers
But have you reinstalled Windows now or why is not working anymore?
If you have reinstalled Windows make sure that Service Pack 3 is installed before you start with sound driver installation. It contains an important update for that.