Vista SP2 Upgrades

I just upgraded to Vista SP2 on a HP Pavilion dv9700. I now have no audio device. I have a "Audio Device on High Definition Audio Bus" in Device Manager I have tried installing the 3 below drivers. None have worked.

Conexant High Definition SmartAudio 221 Version:
Conexant High Definition SmartAudio 221 Version:
High Definition Audio Device

 I have uninstalled it rebooted and tried reinstalling it but it will not install just errors our with "Windows encountered a problem installing the driver software for your device" "This operation requires an interactive window station"

Help Please
Nick DanielsIT ManagerAsked:
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try to download the latest driver from hp website and install it
Nick DanielsIT ManagerAuthor Commented:
Yeah wish it was that easy. Here is what happened. I installed Vista Service Pack 2. I have since uninstalled it. In Device Manager it says "Audio Device on High Definition Bus" with a yellow exclamation. When I try to update (Let windows search for the drivers) it finds the Conexant High Defintion Smart Audio 221 but it says that if fails to install the device saying "This operation requires an interactive window station". I have removed Service Pack 2 and all updates I applied in those days. I tried installing in Safe Mode but it didn't install there also. I have contacted HP and the want me to just format. I would rather not. The driver I have downloaded from HP the SP40170 the updated drivers. Any ideas?
Nick DanielsIT ManagerAuthor Commented:
Fixed issue. Had to reformat. That was the only solution.

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