Compaq Presario CQ40-401AU Windows Vista Driver

For windows vista ultimate (32bit)

AMD USB Filter Driver
AMD Video Driver

Driver - Keyboard, Mouse and Input Devices
ALPS Touchpad Driver
ENE CIR Receiver Driver
Validity Fingerprint Sensor Driver

Driver - StorageJMB38X Card Reader Host Controller Driver

Software - MultimediaHP MediaSmart TV Software
HP MediaSmart SmartMenu Update
HP DVD Play

and all other driver should be detected after vista installation but if its not, use the driver below:

Sound:
(i believe that sound already work in your laptop after installing vista) if not try this:
IDT High-Definition Audio CODEC Driver

Video/VGA
yours is i believe using ATI Radeon HD 3200
Download
or
Download

BIOS:
Download

Network(use this driver if only you cannot use the wireless)
Realtek RTL8102E/8111C Family PCI-E Gigabit Ethernet NIC Driver
HP Wireless Assistant

webcam
Cyberlink YouCam Software A-Note Drivers Acer Drivers Alienware DriversApple DriversAsus Drivers-BenQDrivers Clevo Driver Compaq Drivers Dell Drivers DTK Drivers HCLDriver How-To HP Drivers Lenovo Drivers LG Drivers Medion Driver MSI Drivers NEC Drivers nVidia Drivers Packard Bell DriversPositivo Drivers SaharaSahara KN7 Samsung Drivers Single Driver Sony Vaio Toshiba Drivers