Ayuda, no me va el sonido vt8237a/8251

Hola,
No hay forma de que vaya el sonido ni poder descargarmelo, por favos decirme que puedo hacer y si me lo explicais mejor, muchas gracias a todos

Mi ordenador es el siguiente:

--------[ EVEREST Home Edition (c) 2003-2005 Lavalys, Inc. ]------------------------------------------------------------

Versión EVEREST v2.20.405/es
Sitio Web http://www.lavalys.com/
Tipo de informe Informe rápido
Ordenador 11876988031
Generador Esther
Sistema operativo Microsoft Windows XP Media Center Edition 5.1.2600 (WinXP Retail)
Fecha 2011-01-06
Hora 22:42


--------[ Resumen ]-----------------------------------------------------------------------------------------------------

Ordenador:
Sistema operativo Microsoft Windows XP Media Center Edition
Service Pack del Sistema Operativo Service Pack 3
DirectX 4.09.00.0904 (DirectX 9.0c)
Nombre del sistema 118769880310 (Esther y Marina)
Nombre de usuario Esther

Placa base:
Tipo de procesador Unknown, 1866 MHz (3.5 x 533)
Nombre de la Placa Base Desconocido
Chipset de la Placa Base Desconocido
Memoria del Sistema 2048 MB
Tipo de BIOS Award (08/07/06)

Monitor:
Tarjeta gráfica NVIDIA GeForce 7300 SE (512 MB)
Acelerador 3D nVIDIA G72

Multimedia:
Tarjeta de sonido VIA VT8237A/8251 High Definition Audio Controller

Almacenamiento:
Controlador IDE VIA Bus Master IDE Controller - 0571
Controlador IDE VIA Serial ATA Controller - 0591
Disco duro ST3250824AS (232 GB, IDE)
Disco duro Generic USB SD Reader USB Device
Disco duro Generic USB CF Reader USB Device
Disco duro Generic USB SM Reader USB Device
Disco duro Generic USB MS Reader USB Device
Lector óptico _NEC DVD_RW ND-3550A
Estado de los discos duros SMART OK

Particiones:
C: (NTFS) 30710 MB (12114 MB libre)
D: (NTFS) 199753 MB (152986 MB libre)
Tamaño total 225.1 GB (161.2 GB libre)

Dispositivos de entrada:
Teclado HID Keyboard Device
Teclado Standard 101/102-Key or Microsoft Natural PS/2 Keyboard
Ratón PS/2 Compatible Mouse

Red:
Tarjeta de Red VIA Rhine II Fast Ethernet Adapter (192.168.1.2)

Dispositivos:
Impresora HP OfficeJet
Impresora Microsoft XPS Document Writer
Controlador USB1 VIA VT83C572 PCI-USB Controller
Controlador USB1 VIA VT83C572 PCI-USB Controller
Controlador USB1 VIA VT83C572 PCI-USB Controller
Controlador USB1 VIA VT83C572 PCI-USB Controller
Controlador USB2 VIA USB 2.0 Enhanced Host Controller
Dispositivos USB USB Mass Storage Device



--------[ Debug - Video BIOS ]------------------------------------------------------------------------------------------

C000:0000 U.x.K7400.L.w.VIDEO ......y...IBM VGA Compatible........05/09/06
C000:0040 .................x..X.%4....0........."..Q......PMIDl.o.......
C000:0080 .....3~.......j!................................................
C000:00C0 ................................................................
C000:0100 ....HWEAPCIR............x.......NVIDIA G72 P262 SKU 0014 VGA BIO
C000:0140 S...IOS..........................................Version 5.72.2
C000:0180 2.46.21 ...Copyright (C) 1996-2006 NVIDIA Corp..................
C000:01C0 .....................................G72 Board - p262h14 .......
C000:0200 ........Chip Rev ...........BIT......F2.....B.....C.....D.....
C000:0240 I.....L.....t.....M.....N.....P.....S.....T.....U.....V.....c...
C000:0280 ..i.%.%.s...J.....F"r.!.................UU..........\.0}^..P.\_n
C000:02C0 _v_._._._n_v...............0.H.#'.K_........................6...
C000:0300 B.... .Pq....(c0.w0#..#...V..^..6.6..F"r.!'.P...)D;_04/12/06....
C000:0340 ..........................1.:.Z...:.:.........I.:.v.....Y...F...
C000:0380 ..z.....:...:...:.Z.:...:.:.:.2.a.:...>Ze.........<.'.S...n.d.q.
C000:03C0 q.....t.>...:.x.p...............f'...\_................u..fa....


--------[ Debug - Unknown ]---------------------------------------------------------------------------------------------

HDD ST3250824AS
Motherboard 08/07/2006-PT890-8237A-6A7L8M4BC-00
Motherboard DMIMOBO: Packard Bell BV Cuba MS-7301
Motherboard DMISYS: Packard Bell BV IMEDIA MC 9600
Motherboard PT890 W7301VP2 V0.20 080706 18:55:43
PCI/AGP 1106-0327: VIA Standard Host Bridge [NoDB]
PCI/AGP 1106-0591: VIA Serial ATA Controller - 0591 [NoDB]
PCI/AGP 1106-1327: VIA Standard Host Bridge [NoDB]
PCI/AGP 1106-2327: VIA Standard Host Bridge [NoDB]
PCI/AGP 1106-3327: VIA Standard Host Bridge [NoDB]
PCI/AGP 1106-4327: VIA Standard Host Bridge [NoDB]
PCI/AGP 1106-5327: VIA I/O APIC Interrupt Controller [NoDB]
PCI/AGP 1106-6327: VIA Security Device [NoDB]
PCI/AGP 1106-7327: VIA Standard Host Bridge [NoDB]
PCI/AGP 1106-A327: VIA PCI to PCI Bridge Controller [NoDB]
PCI/AGP 1106-B999: PCI standard PCI-to-PCI bridge [NoDB]
PCI/AGP 1106-C327: VIA PCI to PCI Bridge Controller [NoDB]


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