Hey I'm hoping you got that issue resolved, PS. My friend has the same laptop, in BIOS on the left I don't remember 100% but I think it says Boot Options or Boot... something maybe configuration or setting.
If you click on that, you should see two options there is RAID usually on the right hand side ticked, tick the middle option or left option I don't think it says AHCI but that is the option that allows it to work like AHCI. Also scrolling doesn't seem to work on those laptops in the BIOS so click downwards, and ensure RAID options including Intel Trusted Boot and EFI protected/secure something options are disabled.
With each option after making the change click on apply/save change/s then continue with the next setting etc. This should fix the problem. The EFI provided MaLd0n I can guarantee should work 100% for you, I recently I don't remember roughly a month now or little bit closer to 2 months I think ago I paid for the service and he provided excellent customer support and assisted me through the entire process. So trying to help back in little ways too here if I know or can, basically that's what I do know about your laptop, the options should not be different to what I mentioned. Let me know if it worked 🙂