How to Enable AHCI for SSD in Windows 10.

How to Enable AHCI for SSD in Windows 10.

Q. I’ve installed a Samsung 850 Pro 512 gig SSD. The Samsung Magician is telling me ” AHCI is disabled for one or more connected SSDs. The system must boot in AHCI mode for best performance”. How do I enable AHCI in Windows 10 Pro?

Answer.

You can try the below steps and check if it helps:

1. While in Windows, press the Win+R keys to open Run, type Regedit, and click/tap on OK to open Registry Editor.
2. If prompted by UAC, click/tap on Yes.
3. In the left pane of Registry Editor, browse to the key location below.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\iaStorV

4. In the right pane of the IA store key, double click/tap on the Start DWORD to modify it. (see screenshot above)
5. Type 0 (zero) for AHCI, and click/tap on OK.

6. In the left pane of Registry Editor, browse to the key location below.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\iaStorAV\StartOverride

7. In the right pane of the StartOverride key, double click/tap on the 0 DWORD to modify it.
8. Type 0 (zero), and click/tap on OK.

9. In the left pane of Registry Editor, browse to the key location below.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\storahci

10. In the right pane of the storahci key, double click/tap on the Start DWORD to modify it. (see screenshot above)
11. Type 0 (zero) for AHCI, and click/tap on OK.

12. In the left pane of Registry Editor, browse to the key location below to see if you have the StartOverride here. If you don’t, then go to step 15 below. 
          HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\storahci\StartOverride

13. If you do, then, in the right pane of the StartOverride key, double click/tap on the 0 DWORD to modify it.
14. Type 0 (zero), and click/tap on OK.

15. When finished, close Registry Editor.
16. Boot the computer to your BIOS or UEFI firmware settings.

17. In your BIOS or UEFI firmware settings, enable AHCI, and save & exit to apply and restart the computer.

Note: These settings will vary per brand and model number of motherboard. Please read your motherboard manual for more specific details about how to change SATA settings for it.

18. When Windows starts, it’ll automatically install AHCI drivers.

19.  When finished, you’ll need to click/tap on Restart Now to restart the computer one last time.

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