Conexant AC97 Audio driver
here1) Download above file
2) Run sp35558.exe. It will fail.
3) Go to directory where sp35558.exe unpacked it's files.
4) Open CP6308Ba.inf file in notepad.
5) Find line:
[Conexant.NTamd64]
%*WDM_AMCAUD.DeviceDesc%=WDM_AMCAUD_DF,PCI\VEN_1002&DEV_4370&SUBSYS_3091103C
6) Copy line. Insert copy on new line, right above original. Add &REV_02 to end of line. It will look like this:
[Conexant.NTamd64]
%*WDM_AMCAUD.DeviceDesc%=WDM_AMCAUD_DF,PCI\VEN_1002&DEV_4370&SUBSYS_3091103C&REV_02
%*WDM_AMCAUD.DeviceDesc%=WDM_AMCAUD_DF,PCI\VEN_1002&DEV_4370&SUBSYS_3091103C
7) Save INF file.
8) Open device manager: Start'Control Panel'Hardware and Sound'Device Manager'Update Drivers
9) In Device Manager application navigate to "Other Devices". Pick the Media device.
10) Right Click on device and select "Update driver software".
11) In dialog click "Browse my computer for driver software"
12) New dialog appears. Click Browse button.
13) In Find Folder Dialog navigate to folder with CP6308Ba.inf file. Click Ok button.
14) Click Next button.
This method was reported as working in Vista64 and Windows 7 64bit version on Dv8000 models."