Presario CQ20-125TU XP Driver

HP/Compaq do NOT support XP for this model.
They only support XP for their Business HP/Compaq models.

However, If you are willing to do some experimental work with XP here are the main drivers for this model.

Use XP SP2 only, most of XP drivers were built based on XP-SP2.

If you don't have XP with SP 2,get it first:
http://tinyurl.com/6kqg8

Use Nlite to sliptream ICH9 sata driver.
A good guide to guide sliptream sata driver
here:
http://maxeasyguide.blogspot.com/2008/04/preparations-for-winxp-installation-cd.html

Nlite download:
http://www.nliteos.com

ICH9 sata driver, the driver is located in iaAHCI.inf and is called ICH9M-E/M SATA AHCI Controller
here:
http://tinyurl.com/5nbgqd

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Drivers for CQ20-125TU

Intel Chipset,(install and reboot before other drivers):
http://tinyurl.com/54r6dt

Mobile Intel 45 Express, here:
http://tinyurl.com/48lunj

MS UAA (required with a reboot before Audio driver)
here:
ftp://ftp.hp.com/pub/softpaq/sp33501-34000/sp33867.exe

ADI SoundMAX AD1984A Audio Driver
here:
ftp://ftp.hp.com/pub/softpaq/sp39501-40000/sp39695.exe

High-Definition Audio (HDA) Modem Installer and Driver
ftp://ftp.hp.com/pub/softpaq/sp39501-40000/sp39545.exe

SCR33x USB Smart Card Reader Driver
ftp://ftp.hp.com/pub/softpaq/sp38001-38500/sp38147.exe

The HP Integrated Module is your Bluetooth Wireless
here:
ftp://ftp.hp.com/pub/softpaq/sp38501-39000/sp38983.exe

Microsoft Windows Installer 3.1 (install before wireless driver)
http://tinyurl.com/9cg2y

Broadcom Wireless LAN Driver
ftp://ftp.hp.com/pub/softpaq/sp39001-39500/sp39243.exe

HP Quick Launch Buttons
ftp://ftp.hp.com/pub/softpaq/sp39001-39500/sp39425.exe

HP 3D DriveGuard 1.10 A
here:
ftp://ftp.hp.com/pub/softpaq/sp39001-39500/sp39040.exe

You may found webcam, Synaptics Touchpad Driver, Marvell Yukon Gigabit Ethernet Controller Driver
from this site:
http://h10025.www1.hp.com/ewfrf/wc/softwareList?os=228&lc=en&dlc=en&cc=us&lang=en&product=3795191