Device Driver Nvidia Mcp61 Hibernate I Need Help With My Audio Driver....?

I need help with my audio driver....? - device driver nvidia mcp61 hibernate

I have no sound on my computer. Instead, they have a litle red circle with a white x in the lower right corner of the taskbar. I went to Device Manager, only my USB audio device can see, is not properly installed. I have tried to solve this problem without success.

My computer details are as follows:

Processor: AMD Anthlon 63 3300 +

Chipset: Nvidia MCP61

Southbridge: NVIDIA MCP61

Brand Team: Megaterend America, Inc.

Version: P1.70

As with Windows Vista Ultimate.

Any help would be appriciated Greatley.