Compaq Presario CQ40-402AU Windows XP Drivers

The driver are also compatible to CQ40-401AU

Install according to order given and report back if you have any problems.

Install .Net Framework before others:
Download

ATI Radeon HD 3200 Graphics/Video Driver
Download

MS UAA (required with a reboot before Audio driver)
Download

IDT High-Definition Audio CODEC Driver
Download

High-Definition Audio (HDA) Modem Installer and Driver
Download

Windows Installer 3.1(required before wireless)
here:
Download

If you have Intel PRO/Wireless Drivers
here:
Download

if you have Broadcom Wireless
here:
Download or
Download

Realtek RTL8102E Family PCI-E Fast Ethernet NIC
here:
Download

JMB38X Card Reader Host Controller Driver
Download

ENE CIR Receiver (vista version)
Download

for HDMI Audio
Download

ALPS Touchpad Driver
Download

or try this new driver (not sure it will work)
Download

HP Quick Launch Buttons
Download

If you have Bluetooth,
The HP Integrated Module is your Bluetooth Wireless
here:
Download

If you had for 7 unknown devices (buttons drivers)here:
Dpownload

Installation --> right click machine.inf, choose install.

THIS IS RISKY, SO MAKE SURE YOU KNOW WHAT YOUR DOING!
You may need to update your BIOS to solve IDT sound driver problem.
You may found all of your BIOS versions
here:
Download