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How To Turn On AHCI After Windows Install


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How To Turn On AHCI After Windows Install

 

This tip can be a real time saver for system builders (if you do not know what AHCI is, this tip is not for you). Have you ever installed Windows 7 and forgot to enable AHCI in BIOS? In the “old” days you were told your only option was to re-install Windows. Not so! The following registry edit will enable AHCI after an install. Go to:

 

HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/services/msahci

 

Then change value of Start to 0 (that’s a zero), and AHCI will work.

 

:)

 

Tip of the hat to MaximumPC Magazine

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  • 5 months later...

A nod from me.

I have used this a while a ago on a multiboot machine.

 

Switching Sata to AHCI (For Hackintosh purposes)

and Win7 and WinVista were fine thanks to the routine above.

WinXP needed a repair install.

 

LL

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