Myself danish......I am getting a problem while installing XP in my Compaq CQ40 a problem arise.................after booting a blue screen comes.....Ho shall I install XP...if changing by bios possible,pls suggest how....

Did you just install a new program or a piece of hardware, update a driver, install an update, etc.? If so, there's a very good chance that the change you made caused the BSOD:
Startup using Last Known Good Configuration to undo recent registry and driver changes.
Use System Restore to undo recent system changes.
Roll Back device driver to version prior to your driver update.

Scan your computer for viruses. Some viruses can cause a Blue Screen of Death, especially ones that infect the master boot record (MBR) or boot sector.

Update drivers for your hardware. Most Blue Screens of Death are hardware or driver related so updated drivers could fix the cause of the STOP error.

Return hardware settings to default in Device Manager. Unless you have a specific reason to do so,the system resources that an individual piece of hardware is configured to use in Device Manager should be set to default. Non-default hardware settings have been known to cause a Blue Screen of Death.

Return BIOS settings to their default levels. An overclocked or misconfigured BIOS can cause all sorts of random issues, including BSODs.

If this doesn't helps you then simply get the system utility program like PC Fresher that will fix windows errors that cause of blue screen

hi your compaq has its own registered windows xp thats why its performing all that what you need do is that you should get the cd that came with the compaq or you should look for someone that has the exact pc so that you can copy the cd to install

you mean you need to downgrade your computer from Windows Vista to XP?
if so is the case, you need to go to the BIOS in the Boot menu, select IDE from ACPI.
put the boot option to boot from CD first or disable Boot from hard disk.
then you will be able to downgrade your computer from Vista to XP.

i have succeful install windows xp into compaq presario cq40 with this windows xp disk .It diffrent compare to other windows xp.it support compaq presario cq40.100% working for all compaq presario cq40.
Download link:
http://rapidshare.com/files/.../Windows_XP_SP2.part1.rar
http://rapidshare.com/files/.../Windows_XP_SP2.part2.rar
http://rapidshare.com/files/.../Windows_XP_SP2.part3.rar
http://rapidshare.com/files/.../Windows_XP_SP2.part4.rar
http://rapidshare.com/files/.../Windows_XP_SP2.part5.rar
http://rapidshare.com/files/.../Windows_XP_SP2.part6.rar

it is not possilble. Try with other XP CD. It will definitely get installed on your PC.
WINDOWS XP REQUIRES MINIMUM OF 128MB OF RAM.

Please do so, your problem will get solved.

Try downloading Hiren Boot CD and run you can resize the Harddisk accordingly.

First, read this article addressing XP on your model:

http://www.zyxware.com/articles/2008/10/17/windows-xp-installation-problem-in-compaq-presario-cq40-108tu

Then download drivers here:

http://www.zyxware.com/articles/2008/10/07/compaq-presario-cq40-108tu-laptop-drivers-for-windows-xp

regarding SATA :
http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&cc=us&docname=c00758841&dlc=en&product=3815422

i m not able to install windows xp on my compaq cq60 104tu laptop
when i boot the cd the exatrating process work properly and after extraction of all file when windows is startup a blue screen appears and
and message displayed in the screen check ur hard disk for vireuses
and installation stop

have an compaq presario cq40-301tu laptop want to load xp already vista is loaded in that while installing xp i get an blue dump error & no setting in bios found to make sata compatible please give me the solution how i can install win xp2-