Hello Fernando. It is remarkable at how long you have been faithfully maintaining this thread. Thank you for your generosity. My apologies if my questions are not appropriate. I am very new to all of this. When I had trouble having my hard drive recognized, I searched and found this thread. My question now is, while I understand how to get my drive to be recognized and working properly, I do not understand what AHCI is (I tried google) and if I need it to function or not. In simple language, what are the benefits of AHCI? Also, I am wondering if I can integrate textmode drivers for video, audio, modem and other devices? My (likely flawed) understanding is that textmode drivers are installed very early in the installation procedure and perhaps would prevent generic drivers being installed by pnp after the OS is installed. I have had a problem with multiple default monitors being installed and with my screen flashing, which it didn't do before I downgraded to xp. I believe I had only one monitor listed with Vista in Device Manager (I now have 5), and additional ones were added or removed automatically as I plugged in or unplugged additional external monitors. I also believe, but I'm not positive, that I had only one instance of my video adapter in Device Manager with my original factory install. Now I have two and I thought this might account for my screen flashing and being unstable at bootup. I have tried uninstalling extra devices but they keep coming back. So I was wondering, if I install the proper video drivers via your textmode method before generic/default drivers are installed, perhaps these issues would not occur? I know NOTHING about this stuff and so I acknowledge that this may be purely ridiculous and illogical. Please advise. One last thing, since I have downgraded from Vista to XP Pro, my WLAN card is not recognized, and in fact the radio light is not on even though the bios and the hardware switch are both enabled. Could this be resolved by a driver? I have force fed the proper driver and it is marked with a yellow exclamation point in Device Manager. It is like it does not exist at all. Perhaps it is the hardware that has failed?