My last holiday use to help my friends laptop to downgrade the truth CQ40 series already bundling of Windows Vista to XP for various reasons (such as many games yg uncomfortable playing in vista, you know gamers). But I was a little surprised that always bring BSOD screen like the following when the Windows installation menu will appear. I try to replace the CD (at first I thought there was an error on the CD damaged) but it still happens. Immediately, I asked to dapetin mbah google for a solution. After a long search, see also cause and solution. Laptop average age is now bundling a package of Windows Vista. Of course there are reasons, one because of Windows Vista on his master's support AHCI technology, which is a kind of technology related to all of you hard disk. While Windows XP does not yet support the technology, and when installed using Windows XP, when entered in the sheet detection Hard Disk .. bluescreen happen .. Actually the problem is Windows XP SP1/SP2 not know AHCI, means we have to make the Windows XP installation CD is known IDE / SATA to be diistall of Windows XP SP2. Here's how I try and have succeeded. to resolve this, i thinks we must to burn a new OS windows XP with support of Sata driver. the tools can make the new os customize is use a tools such us "nLite" software. Now the next step you will began to resolve this. follow this step by step in the below. Some programs required a. Microsoft. NET Framework Version 2.0 b. nLite c. ICH9 sata driver (formerly Copy Hardisk Sata drivers your laptop which is on the driver cd-given when purchasing a laptop. Or, if no please download the official site of your laptop manufacturer. And today I gave an example by using the ICH9 sata driver for CQ40-108TU Laptop which can be downloaded here After all there is, first install the Net framework. When finished install nLite. The next step: 1. Insert the Windows XP Installation CD 2. Run nLite 3. Press the Next button 4. Browse the location of the Windows XP installation CD (i386 folder contained therein). OK Create a folder to save the configuration example "c: \ temp" 5. Browse folders that have been made. OK .. Copy process wait until the end Proses Copy... 6. Copy finished .. Next .. 7. Presets. Next ... 8. Task Selection. Select the Drivers and Bootable ISO. Next 9. Insert. Single drivers ... Browse for the file "iaAHCI.inf" from the folder to extract the file "f6flpy32_85.zip" which has been downloaded previously. 10. Be careful when this option appears, select "ICH9M-E / M SATA AHCI Controller" ... OK .. Next .. 11. Yes, successfully ... 12. Next.. 13. Select Make ISO .. Browse Folders and Save .... to create an ISO file that later in the Burn to CD using Nero Burning and other similar programs. Next to Finish ....... Congratulations, Note: Although not the type of CQ40-108TU, these tips are still used for your laptop is Hp Compaq products, and for other types of manufacturers, lived adjust sata driver