aucun son ds mon ordi

Depuis 2 jour apres formatage , je n'ai plus aucun son sur mon ordinateur et je n'arrive pas à résoudre ce problème. J'ai déjà essayé de mettre à jours le driver son de ma carte mère ,mais rien n'y fait, je n'entends rien : pas de musique, ni même les sons de windows, aidez moi SVP
merci d'avance
Computer:
Computer Type PC uniprocessore ACPI
Operating System Microsoft Windows XP Professional
OS Service Pack [ TRIAL VERSION ]
Internet Explorer 6.0.2900.2180 (IE 6.0 SP2)
DirectX 4.09.00.0904 (DirectX 9.0c)
Computer Name BENNY-0DFC26CD1
User Name benny
Logon Domain [ TRIAL VERSION ]
Date / Time 2006-06-13 / 17:03

Motherboard:
CPU Type AMD Sempron, 1600 MHz 2800+
Motherboard Name Unknown
Motherboard Chipset ULi/ALi M1689, AMD Hammer
System Memory [ TRIAL VERSION ]
BIOS Type Unknown
Communication Port Porta di comunicazione (COM1)
Communication Port Porta stampante (LPT1)

Display:
Video Adapter RADEON 9200 PRO Family (Microsoft Corporation) (128 MB)
Video Adapter RADEON 9200 PRO SEC Family (Microsoft Corporation) (128 MB)
Monitor Monitor Plug and Play [NoDB] (1108165804)

Multimedia:
Audio Adapter Riproduzione linea #0 modem

Storage:
IDE Controller Controller IDE Bus Master PCI M5229 ALi
Floppy Drive Unità disco floppy
Disk Drive Maxtor 6Y080L0 (76 GB, IDE)
Optical Drive PIONEER DVD-RW DVR-110D
SMART Hard Disks Status OK

Partitions:
C: (NTFS) [ TRIAL VERSION ]

Input:
Keyboard Tastiera standard 101/102 tasti o Tastiera Microsoft Natural PS/2
Mouse Mouse compatibile HID

Network:
Primary IP Address [ TRIAL VERSION ]
Primary MAC Address 00-08-27-32-0F-63
Network Adapter Smart Gate USB Network Adapter - Miniport dell'Utilità di pianificazione pacchetti (10.0 [ TRIAL VERSION ])
Modem Smart Link 56K Voice Modem

Peripherals:
Printer Canon iP2200
USB Device Periferica USB Human Interface
USB Device Smart gate USB Network Interface
USB Device Supporto stampa USB


Overclock

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CPU Properties:
CPU Type AMD Sempron 2800+
CPU Alias Venice-256 S754
CPU Stepping DH-E6
CPUID CPU Name AMD Sempron(tm) Processor 2800+
CPUID Revision 00020FC2h

CPU Speed:
CPU Clock 1599.7 MHz

CPU Cache:
L1 Code Cache 64 KB (Parity)
L1 Data Cache [ TRIAL VERSION ]
L2 Cache 256 KB (On-Die, ECC, Full-Speed)

Chipset Properties:
Motherboard Chipset ULi/ALi M1689, AMD Hammer

BIOS Properties:
System BIOS Date Unknown
Video BIOS Date Unknown


Power Management

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Power Management Properties:
Current Power Source AC Line
Battery Status No Battery
Full Battery Lifetime Unknown
Remaining Battery Lifetime Unknown


Portable Computer

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Centrino 1 Platform Compliancy:
CPU: Intel Pentium M (Banias/Dothan) No (AMD Sempron)
Chipset: Intel i855GM/PM No (ULi/ALi M1689, AMD Hammer)
WLAN: Intel PRO/Wireless No
System: Centrino 1 (Carmel) Compliant No

Centrino 2 Platform Compliancy:
CPU: Intel Pentium M (Dothan) No (AMD Sempron)
Chipset: Intel i915GM/PM No (ULi/ALi M1689, AMD Hammer)
WLAN: Intel PRO/Wireless No
System: Centrino 2 (Sonoma) Compliant No

Centrino 3 Platform Compliancy:
CPU: Intel Core (Yonah) No (AMD Sempron)
Chipset: Intel i945GM/PM No (ULi/ALi M1689, AMD Hammer)
WLAN: Intel PRO/Wireless 3945ABG No
System: Centrino 3 (Napa) Compliant No