driver installation ????

Have toshiba laptop and can not install the divers to make the "multi media device" work properly.
Have no sound. I have d/l the drivers for "sound" off toshiba uk for the right machine but still no sound and an exclamation mark on the device in d/manager. Ive done everything right or have i ?????
Any help gladly appreciated.
Thanx. Dave.

Have sorted it now guys, d/ld the driver from realtek and now works perfectly.
Thanx
Dave.

always good wen ppl solve their own problems..it saves us thinkin :D