Activate AHCI after installing Windows

If you set the SATA mode in the UEFI to AHCI after you’ve installed Windows, you’ll run into problems. Try these steps below before activating AHCI.

  1. boot up Windows
  2. press Win+R keys
  3. type regedit and hit OK
  4. Look for HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\msahci
  5. Adjust the value of the key Start to 0 (normally it’s 3)
  6. reboot the PC and activate AHCI in BIOS

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