ACPI MSFT0101 refer to Intel Platform Trust Technology (Intel PTT). And for Windows 10, you can get it from here: Windows 10 drivers download.From this website, you can find find almost drivers for the Dell, Acer, Lenovo, HP, Sony, Toshiba, AMD, NVIDIA, etc manufacturers. have all drivers for Windows 8, 7, Vista and XP. I looked in the properties part of the up-date driver window and it states 'on Microsoft ACPI-Compliant System', it also states it has a code 28. Code 28 with ACPI Compliant System I have installed windows 7 64bit on my computer, when I look in the device manager, it has an unknown device showing. This document is about installing Windows 7 on HP and Compaq desktop computers. The responsibilities of Acpi.sys include support for power management and Plug and Play (PnP) device enumeration. The Windows ACPI driver, Acpi.sys, is an inbox component of the Windows operating system.