No tengo los driver de audio ayuda!

estos son los datos de mi pc



System Information
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Time of this report: 10/1/2010, 00:39:20
Machine name: R15
Operating System: Windows XP Home Edition (5.1, Build 2600) Service Pack 3 (2600.xpsp.080413-2111)
Language: Spanish (Regional Setting: Spanish)
System Manufacturer: Dell Computer Corporation
System Model: OptiPlex GX270
BIOS: Phoenix ROM BIOS PLUS Version 1.10 A02
Processor: Intel(R) Pentium(R) 4 CPU 2.40GHz
Memory: 254MB RAM
Page File: 141MB used, 867MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
DxDiag Version: 5.03.2600.5512 32bit Unicode

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DxDiag Notes
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DirectX Files Tab: No problems found.
Display Tab 1: The system is using the generic video driver. Please install video driver provided by the hardware manufacturer. Direct3D functionality not available. You should verify that the driver is a final version from the hardware manufacturer.
Sound Tab 1: No sound card was found. If one is expected, you should install a sound driver provided by the hardware manufacturer.
Music Tab: No problems found.
Input Tab: No problems found.
Network Tab: No problems found.