Before downloading and install this driver, i would like to outline several things. First windows 7 is Driver friendly OS (only for new model), which mean some of the driver already installed, so here is some important thing:
1. Normally the drivers need to be install is: Graphic (SMSBUS), Card Reader, Infrared, Quicklaunch, Modem and Touchpad.
2. Other Driver like sound, if you heard sound, no need to install audio. Similar to wireless and other, if they work no need to install.
3. make sure to check windows updates, there are 2 sections which is critical update and optional updates, select optional updates and there you will see several updates for your driver especially graphics.
INF Update Utility - Primarily for Intel® 5, 4, 3, 900 Series Chipsets
Compaq Presario CQ40-128AU Graphic Driver
ATI Mobility Radeon HD 3200/3450/4200/4330 Graphics
Compaq Presario CQ40-128AU Audio Driver
IDT High-Definition Audio CODEC Driver
Compaq Presario CQ40-128AU Button Driver
HP Quicklaunch Button
Compaq Presario CQ40-128AU Touchpad Driver
ALPS Touchpad Driver
HP Wireless Assistant
Compaq Presario CQ40-128AU LAN/Ethernet Driver
Realtek PCI-E Gigabit Ethernet NIC Driver
Compaq Presario CQ40-128AU Wireless Driver
Broadcom Wireless LAN Driver for Microsoft Windows 7
Compaq Presario CQ40-128AU CArd Reader Driver
JMB38X MS SD SD/MMC xD Card Reader Driver
Validity Sensor Driver For Windows 7
Compaq Presario CQ40-128AU Webcam Driver.
Cyberlink YouCam Software
Lightscribe System Software
Compaq Presario CQ40-128AU Infrared Driver
ENE CIR Receiver Driver
HP USB Recovery flash Disk
HP Recovery manager for Windows 7
HP Mediasmart DVD software