(you have to register with the InsanelyMac forums before downloading) and start it. This tool automates the MBR edits necessary to enable AHCI under Windows and works with a variety of Intel chipsets (ICH7, ICH8, ESB63xx, ICH10, 5 Series). Next, select the appropriate volume and wait for the AHCI Enabler to detect the chipset. Then, make a backup of your MBR by clicking on "File" and "Save Backup MBR to File", and finally click on "Modifiy".

If you see this error, you'll either have an NVIDIA or an unsupported Intel chipset (Sandy Bridge).

My MacBook Air 2011 has an Intel Series 6 chipset, which is not yet supported by AHCI Enabler. If all works out for you, jump directly to step 8. If it didn't work and if you've got a Sandy Bridge 2011 MacBook Pro or Air, read further.

Well, here comes the complicated part: