How To Enable AHCI For Windows 7?

I'm trying to get my Samsung 840 Evo SSD to enable AHCI, but have been reading and it appears to be more difficult than a few simple changes. I have an Early 2011 15" Macbook Pro. How do I get AHCI enabled for Windows 7?
Thank you in advance.

Thank you for the link. I'm still not sure what needs to be done. I made the changes in 'regedit' like the forum stated, but am still having issues. I will post screenshots below that are showing up. More assistance would be greatly appreciated.

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This question was solved.
View Solution.

Hi:
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Hi,
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Can you enable AHCI in Windows 7 on a MacBook Air 11"?

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http://msdn.microsoft.com/en-us/windows/hardware/gg463525
exactly pay attention to this:
* The GUID Partition Table (GPT) was introduced as part of the Unified Extensible Firmware Interface (UEFI) initiative.
and than - this:
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Can Windows 7, Windows Vista, and Windows Server 2008 read, write, and boot from GPT disks?
Yes, all versions can use GPT partitioned disks for data. Booting is only supported for 64-bit editions on UEFI-based systems.
Last one sounds good, yes? Actually no:
Windows GPT Required Partitions
EFI System Partition
What is the Extensible Firmware Interface System Partition (ESP)?
The ESP contains the NTLDR, HAL, Boot.txt, and other files… blabla
Do you really think that NTLDR, HAL, Boot.txt are parts of OS-independent UEFI standart?
Can there be two ESPs on a single disk?
Such a configuration should not be created and is not supported in Windows.
So Apple just can not create special win-specific partition for Windows to load directly - it just does not support it
Microsoft Reserved Partition
What disks require an MSR?
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Do you really think that Microsoft Reserved Partition is a part of OS-independent GUID GPT standart?
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The MSR must be created when disk-partitioning information is first written to the drive. If the manufacturer partitions the disk, the manufacturer must create the MSR at the same time.
So for windows to boot directly, Apple should themselves create windows non-standard partition on every mac sold.
And, furthermore, it (Apple) have to install NTLDR, HAL, Boot.txt and other MS crap on every mac. Paying license fee for that.
It's not my fantasies - it's open data from Windows Hardware Developer Center > Learn > Devices > Storage Technologies > Windows and GPT FAQ of MS itself.
And same story you can find about UEFI support on Windows. Non-standard things required here and there.
Do you know that Linux can boot on macs directly, as it doesn't require some MSR sh*t and such?
There are a lot of things to blame Apple, but not this one

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Since this forum is to discuss: Visual Studio WPF/SL Designer, Visual Studio Guidance Automation Toolkit, Developer Documentation and Help
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How To Enable AHCI For Windows 7?

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