Windows 10: Enable AHCI in Windows 8 and Windows 10 after Installation  

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  1. Posts : 143
    Win 7 Ult + 2 x Win 10 Pro - all x64
       29 Dec 2015 #20

    Obviously as I was expecting a failed boot or BSOD's at worst....LOL
    BTW Shawn there is an error in step 6...you talk about iAStorv but show iAStorAV in the illustration.. Does that step apply to both?
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  2. Posts : 22,913
    64-bit Windows 10 Pro build 16257
    Thread Starter
       29 Dec 2015 #21

    Thank you Peter. Corrected.
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  3. Posts : 143
    Win 7 Ult + 2 x Win 10 Pro - all x64
       29 Dec 2015 #22

    Thanks.
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  4. Posts : 1
    Windows 10 Home Premium
       10 Jan 2016 #23

    Just registered to say this process worked on an older (2011) Acer 8172T TravelMate laptop I just upgraded from Win 7 to Win 10. This was given to me used, and I noticed after installing Win 10 that it was ACHI-capable but in IDE mode post-install. This procedure worked well. Tks.
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  5. Posts : 22,913
    64-bit Windows 10 Pro build 16257
    Thread Starter
       10 Jan 2016 #24

    I'm glad it could help Rick, and welcome to Ten Forums.
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  6. Posts : 53
    Windows 10 Enterprise x64 (Insider)
       29 Jan 2016 #25

    dingorob said: View Post
    In your tutorial above I think you should mention the startoverride subkeys. They need to have 0 dwords too.
    It's worth clarifying that StartOverride is special. It's not the case, like the other values, that 0=AHCI and 3=IDE. Windows actually resets StartOverride to 3 on every boot regardless of AHCI or IDE.

    Changing it to 0 gives Windows the "load driver" signal for the next boot, which is important when changing disk modes. A value of 3 means "do nothing," essentially, which is not what you want for this particular boot.

    It resets to 3 after booting because it would be pointless for Windows to take this action with every boot.
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  7.    04 Feb 2016 #26

    Hello. I've used several methods to activate AHCI in Windows 10 including the instructions posted here. In all cases, after a few days or a week, my system comes to a grinding halt after booting into W10. After waiting many minutes for the system to reboot, and changing my BIOS back to IDE does the system run as expected.

    But even in those situations, I'm starting to see a slow down.

    Is there any reason to believe that if I do a clean W10 install and make sure AHCI is selected in BIOS that I my system might be more stable vs. trying to switch to AHCI when BIOS was originally set to IDE? Should W10 run any smoother after AHCI drivers are installed during a clean install vs switching after the fact?

    Might there be other BIOS changes I need to look at in addition to AHCI?

    Thank you
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  8. Posts : 22,913
    64-bit Windows 10 Pro build 16257
    Thread Starter
       04 Feb 2016 #27

    Hello wwsras, and welcome to Ten Forums.

    Usually a clean install while set to use SATA/AHCI will sort this.
      My ComputersSystem Spec

  9.    04 Feb 2016 #28

    Thanks. I'll give that a try and see if my issues are resolved.
      My ComputerSystem Spec


  10. Posts : 53
    Windows 10 Enterprise x64 (Insider)
       04 Feb 2016 #29

    Brink said: View Post
    Usually a clean install while set to use SATA/AHCI will sort this.
    What is it about? I've never heard of a system, once switched successfully, suddenly become resistant to it and want to switch back.
      My ComputerSystem Spec


 
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