No Sound problem (Windows 7 Ultimate)

I've installed windows 7 ultimate (32), everything works fine except audio. Will provide all necessary info below.

Downloaded Realtek driver latest version but still no luck.

CPU - Core 2 Duo E8400
Motherboard - Abit IP35-E
RAM - Transcend 2GB
HDD - Seagate 500GB
GPU - GeCube HD4850 512MB
Monitor - Dell 19'' SE198WFP
SMPS - Corsair VX450W

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