Only install the driver you need, for example if there are no sound and no wifi, install audio and wifi only.
AUDIO
Conextant smart Audio
SP40270 25MB
Download
GRAPHIC
There are 2 appliccable graphic which is intel and nvidia.
Mobile Intel 945GM Express Chipset Family Video Driver
Download 32-bit
Download 64-bit
NVIDIA GeForce Go 7200 Driver
Download 32-bit
Download (64-bit)
CARD READER
Ricoh Card Reader Driver
Download
WIRELESS
Normally windows will automatically install your wireless driver, if it did not:
Intel PRO/Wireless,
sp41263 or sp45671
Broadcom Wireless,
sp39911 or sp45524
BLUETOOTH
Support Software for HP Integrated Module with Bluetooth Wireless Technology
Download
MODEM:
Conextant HD Modem
Download