Install windows XP in compaq presario CQ40-317tu

1.First make Vista backup. How to do it all informations here.

2.Update Your Bios here.
This is very important for this model. If You will not do this Your audio may not work in XP.

Now You need to slipstream Your Sata drivers (only ICH9M) with nLite.
Download Nlite: Download
Download sata Drivers: Download

Read the Guide here: Slipstream Guide

Be sure also that You are using WinXP SP2 version. If you haven't got SP2 version here you can download this service pack: Download

Install Windows XP on compaq presario CQ40-425TU

You need to create a new XP cd to install window XP on this laptop. So to do that we need to perform a process called slipstream.

Materials need to download:

Nlite: Download
Intel ICH9M-E/M SATA AHCI Controller Driver: Download
Windows XP sp2 patch: Download

and then follow this instruction: here

Install windows XP in compaq presario cq40-337tu

Update Your Bios here. There are big changes in this new version.

Here is the guide to install XP,

First make vista backup:here

Prepare this material:

Download Nlite: Download

Sata controller: Download
32-bit Floppy Configuration Utility

A blank CD

You have to create a new windows XP CD using the one that you have:
Here is the guide to slipstream: GUIDE

Install Windows XP in Compaq Presario CQ40-401AU Notebook

Compaq Presario CQ40-401AU is design for windows vista. Installing windows XP driectly using original windows XP CD will result in Blue Screen Error or " No hdd was found".

There is a famous trick to solve this problems which know as slipstream guiide to install windows XP. Slipstream process is not too difficult but for this model which use AMD sata drivers it can be a little bit tricky.

You can read how to slipstream guide here, something worth to mention is:
1. Make sure to use right sata drivers.
2. If you are about to repeat the process, delete all folders and create new folder.
3. If you failed 2 - 3 times, that normal.
4. Windows XP SP2 is preferable.

TUTORIAL LINK: Slipstream Guide to Install windows XP