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Can I enable AHCI after installing Windows 7 in a SATA drive that was on IDE mode?

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1 Answer 1

up vote 15 down vote accepted

Open regedit and navigate here:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\msahci

Set the value of the "Start" dword to 0.

using regedit to enable AHCI mode in Windows 7

Reboot and enable AHCI in BIOS, now it should work.

Remember to create a restore point before any changes, just in case.

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It only worked when I followed your procedure. –  Jader Dias Feb 20 '10 at 2:36

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