Download the Asus K40IJ drivers for windows xp below:

Chipset driver must be installed first and hotfixes must be installed first before the installation of any device drivers, such Microsoft KB888111 Hotfix must be installed first before installing the audio driver. All else should be fine on normal installations.

Disclaimer: The following drivers may work or will not work for you and is provided as is. Although the links are pointing directly to the asus download server, this site is not in anyway affiliated to asus.

Chipset Driver
Microsoft KB888111 Hotfix
Via Audio Driver
Intel VGA Driver
Atheros AR8121 Lan Driver
ALCOR Card Reader Driver
Elantech Touchpad driver
K40_K50 SPLENDID Utility
Wireless Console Utility

Hotfix for Windows XP that adds support for SDHC cards that have a capacity of more than 4GB
AW-NE771 Wireless Lan Driver and Application for WIN XP(Please first install the Wireless Console Utility before this driver installation)

Asus K40IJ Windows Xp Drivers