You should have gotten the name of the SATA ACHI controller first. That is the reason one should always have a USB FDD in their tool kit. I'm going to take an educated guess, and say you have the Intel(R) Mobile Express Chipset SATA AHCI Controller. Now that you already have XP installed, first install the chipset driver and reboot. Then download the second file listed, and extract these drivers to a folder you put somewhere on your C: drive so you can browse to it later. = Follow this procedure to install the ACHI driver in XP: 1. Right-click the My Computer icon, click Manage, select Device Manager 2.

Download the latest drivers for your Standard SATA AHCI Controller to keep your Computer up-to-date. HP G61-511WM Laptop I need a loadable AHCI driver so that I can install windows 7x64 on this thing. My friend handed my this laptop, yes it was a walmart laptop.

Click the + symbol beside IDE ATA/ATAPI controllers, this would show the devices under this category. You will find the Intel SATA ACHI storage controller listed. Right-click on the Intel ® 6 Series/C200 Series Chipset Family 4 port Serial ATA Storage Controller - 1C01 listed, and click Update Driver. In Welcome to the Hardware Update Wizard, select No, not this time. Select Install from a list or specific location (Advanced).

Click Next 7. Select Don't search I will choose the driver to install.

Click Next 8. Click Have Disk 9. 6340 Free Hp Ipaq Software on this page. Click Browse 10. Select location: c: folder you saved the Intel ACHI drivers to. Select iaAHCI.inf 12. Click Open 13. Hp 990c Driver Windows 8 more.

This will list several SATA AHCI Controllers. From this list, select the Intel(R) Mobile Express Chipset SATA AHCI Controller. The Update Driver Warning will be shown. Click Yes 15.

The driver will install, and completing the Hardware update Wizard appears. Click Finish 16. You can find the updated controller in the device manager. During restart, press the F10 key and boot to BIOS setup utility.

Go back to your device configurations sub menu and change the SATA setting back to ACHI, save settings there (F10) and upon exit, save changes and reboot. Now, the SATA driver is successfully installed and the desktop will boot into Windows with SATA Device Mode set to AHCI. Hi: Just go into the BIOS under device configurations and change your SATA device mode from ACHI to IDE. Save the setting there by hitting the F10 key and then again when you exit.

XP will now install without any fancy footwork. Before you wipe out W7, go to the device manager and click on your IDE ATA/ATAPI controllers line. Post the name of your SATA ACHI controller and I will send you the link to the drivers. Then you can load it after you install XP and change the BIOS SATA setting back to ACHI. You can also use XP mode on virtual PC and keep Windows 7 and use your XP only compatible program in XP mode. XP is already on the laptop in question, in IDE mode. Changing to AHCI causes a blue screen on startup, and XP doesn't allow an F6 driver on install from anywhere other than a floppy, which most machines don't have these days.