Sometimes it happens that your computer is still running in IDE mode. Modern harddisks and SSD drives perform much better when running in AHCI mode. Also your harddisks lifetime and health improves from AHCI mode. When you switch your bios from IDE to AHCI without preparation, Windows would return a blue screen as soon as it boots up. This is because Windows is not yet configured for the AHCI controller. In this article we will explain how to switch from IDE to AHCI without reinstalling Windows. This method should be safe to execute, however usage is at own risk!
- Regedit (build-in in Windows)
- Knowledge of your bios
Navigate in Regedit to the following key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\storahci\StartOverride
Double click these folders to get there:
Most bios are accessable by pressing ESC, F2, or DEL (HP Computers: F10) while the computer is starting. Once you are inside the bios, you should navigate to the Sata Type Settings. These are different to find for each type of bios, but in general these settings should be in Peripherals / Storage configuration. Once you have found them, you can change it from IDE to AHCI. Now safe your settings and exit bios. Windows 10 will now boot with AHCI controller mode and find these drivers once you logon to Windows!
If you still experience bluescreen ( INACCESSIBLE_BOOT_DEVICE ) you can always switch the bios back to IDE and Windows should just start fine again. However, Windows 10 had not been changed to AHCI mode. You can try to get it to work by executing these steps over again and boot into safe mode after changing bios settings. (Easiest way for booting into safe mode in Windows 10 is by executing msconfig and selecting “boot into safe mode” in the “start computer” tab) (This should be done after closing the Regedit). Remember to execute msconfig again after install to disable safe-boot again!