If you went to HP support site, it only list out drivers for Windows XP and Vista and no support for Windows 7. Another thing is, there is no Audio driver for Windows XP listed, so here is the driver set you will need:
4. Modem : Agere (LSI) Soft Modem : Download
1. Chipset :
Not important, Windows will update the necessary driver.
Or if you want it badly, get it here: Download from Intel
2. Audio : Download
Installation : Download the driver file, extract it, run to install. If failed, try to right click on setup and select run as admin.
Intel 915 read the installation instruction here : Download and install
Nvidia Graphic : Let nvidia detect and give you the best driver: http://www.nvidia.com/Download/Scan.aspx?lang=en-us
The other drivers automatically installed.
If you have problem with audio, get me the hardware ID for the audio and post it here. Here is the guide to get the hardware ID.