I have a Thinkpad X220 laptop with Windows 10 Pro installed, I have set the Intel AT setting in firmware/bios to "permanently disabled", but the Intel Management and Security Status application still shows the status of Intel AT service as Enabled (see the image below).
How can I make the Intel AT service disabled ?
The laptop never have Intel AT activated at all. When I bought the laptop, the Intel AT status in BIOS is disabled and not activated.
I also have checked with Intel AT Status tool, the Intel AT status is Not Enrolled.