LAN (Ethernet) driver:
As part of the nvidia chipset driver-
http://cn.download.nvidia.com/Window..._14.10_Int.exe
Sound:
Install this first - (UAA Driver)
ftp://ftp.hp.com/pub/softpaq/sp32501-33000/sp32646.exe
and then force install this:
http://www.mediafire.com/?dg0cmmkm4y4
By force install, I mean going to Device Manager and choosing to specify the driver yourself (Right click on the device in Device Manager, Update Driver > Install From A list or specific location > Don't Search, I will choose the driver > Have Disk. Browse to where you have unzipped the downloaded driver. You may get a warning that it cannot be verified and unsigned, just proceed with it anyway ). The setup program cannot be used as it will fail.