Probleme son et autre après réinstal windows

Bonjour, j'ai réinstallé windows xp sur mon PC mais je n'ai plus de son.
Mon PC est monté avec différent composants (pas de marque).

La carte mère est une MSI 915G combo.

spécifications

CPU

• Supports Intel Pentium 4 Prescott processors in LGA 775 (Socket T) package
• Supports Pentium 4 3XX, 5XX Processor or higher speed
• Supports Intel Hyper-Threading (HT) Technology

Chipset

Intel® Grantsdale 915G Chipset
• Supports FSB 800MHz
• Support Dual channel DDR2 533/400 memory interface upto 2GB
• Support Dual channel DDR 400/333 memory interface upto 2GB
• Support PCI Express 16X interface
• Integrated Graphics Controller

Intel® ICH6 Chipset
• Integrated Hi-Speed USB 2.0 controller, 480Mb/sec, 8 ports
• 4 Serial ATA/150 ports
• 1 channel Ultra ATA 100 bus Master IDE controller
• PCI Master v 2.3, I/O ACPI 2.0 Compliant
• Integrated AHCI controller

FSB

• Support 800MHz

Main Memory

• Supports 2 unbuffered DIMM of 1.8 Volt DDR2 SDRAM without ECC
• Supports 2 unbuffered DIMM of 2.5 Volt DDR SDRAM without ECC
• Supports up to 2GB memory size
• Support Dual Channel DDR2 533/400MHz (*DDR2 Memory Modules are not the same as DDR Memory Module, please check with your memory vendor for more information)
• Support Dual Channel DDR 400/333MHz

Slots

• One PCI Express 16X slot
• Two PCI Express 1X slot
• Three PCI 2.2 32-bit Master PCI Bus slots. (support 3.3v/5v PCI bus interface)

On-Board IDE

One Ultra DMA 66/100 IDE controller integrated in ICH6
• Supports PIO, Bus Master operation modes
• Can connect up to 2 Ultra ATA drives

Serial ATA 150 controller integrated in ICH6
• Up to 150MB/s transfer speed
• Can connect up to 4 Serial ATA drives
• Supports ACHI controller
• Supports SATA hot plug

On-Board Peripherals

• 1 floppy port supports 1 FDD with 360K, 720K, 1.2M, 1.44M and 2.88Mbytes
• 1 Serial port (COM A)
• 1 VGA port
• 1 parallel port supports SPP/EPP/ECP mode
• 8 USB 2.0 ports (Rear x 4/** Front x 4)(** Frotn USB ports are supported by pin-out)
• 1 Line-In/Line-Out/Mic-In/RS Out/CS Out/SPDIF Out-Optica/Coaxial Audio port
• 2 PS/2 connectors
• 1 LAN RJ45 connector

VIA 6410 IDE RAID Controller

• Integrate two Ultra DMA 66/100/133 IDE controllers
• Support RAID (0,1 and 0+1)
• Connect upto 4 Ultra ATA 133 devices

Audio

8 Channel Azalia controller integrated in Intel ICH6 Chipset
• 8-channel audio codec C-Media 9880L
• Compliance with Azalia 1.X spec
• Support Multi-Streaming function
• Support Universal Audio Jack (only Front Audio Jack)

LAN

Realtek® 8110S
• Integrated Fast Ethernet MAC and PHY in one chip.
• Supports 10Mb/s, 100Mb/s, 1000Mb/s
• Compliance with PCI 2.2.
• Supports ACPI Power Management.

BIOS

• The mainboard BIOS provides "Plug & Play" BIOS which detects the peripheral devices and expansion cards of the board automatically.
• The mainboard provides a Desktop Management Interface(DMI) function which records your mainboard specifications.

mon gestionnaire de périphériques indique des problèmes sur:

controleur PCI communications simplifiées
controleur RAID
périphérique audio sur bus high définition audio

pouvez vous m'aider?
J'ai déja fait une scan des drivers manquants, cela a résolu des autres problèmes mais pas ceux ci.

Merci d'avance