Download Drivers Compaq Presario CQ40-404TU Windows XP. This was my suggestion drivers for the model, any problems and broken link please leave your comments. If you have problem installing the drivers report and i will add details asap.

Install .Net Framework before others:
Download

INTEL Chipset.
filename: infinst_autol.exe
INF Update Utility – Primarily for Intel® 5, 4, 3, 900 Series Chipsets
Download (direct link)
Download

(intel website)
Download(mediafire)

VGA/GRAPHIC
Mobile Intel 45 Express Chipset Family Graphics Driver
Intel graphic accelerator 4500MHD
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

WIRELESS:

There are two wireless available, download and install base on your specs:

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

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:
Download

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

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