Compaq Presario CQ40-653TU VISTA Drivers

CHIPSET DRIVERS:
INF Update Utility - Primarily for Intel® 5, 4, 3, 900 Series Chipsets
Download (direct link)

Intel matrix storage manager:
Download (intel site)
Download (mediafire)

ICH9 sata driver,
Download  (microsoft)
Download (mediafire) 

AUDIO:
IDT - High Definition Audio Codecs
Download (sp45211)
If it didn't work use below:
Download (SP41616)
Download (SP41500)


VGA/GRAPHIC
Mobile Intel 4 Series Express Chipset Family Graphics Driver (32-bit)
Download

WIRELESS:
==================
If you have Intel Wireless:
Intel Wireless LAN Driver for Microsoft Windows Vista
Download

If you have Broadcom Wireless:
Broadcom Wireless LAN Driver for Microsoft Windows Vista
Download
===============

Software Support for HP Integrated Module with Bluetooth Wireless Technology
Download

HP Wireless Assistant
Download

JMB38X Card Reader Host Controller Driver
Download

HP QuickPlay Web Update
Download

Cyberlink YouCam Software
Download

Lightscribe System Software
Download

HP Quick Launch Buttons
Download

ETHERNET:
Realtek RTL8102E/8111C Family PCI-E Gigabit Ethernet NIC Driver
Download

or if didnt work try

Realtek RTL8102E/8103E Family NIC Driver
Download