As Chaos said, you need to install the Intel MEI (Management Engine interface) driver. Contrary to popular belief, the MEI driver is vital for your chipset to communicate with your hardware. Go to Asus site for your board and get the latest MEI driver for your OS.
Also as others have said, you don't need ANY of the Asus Utilities on the disc for your board, in fact you don't need the disc for anything.
+1 for Halloran's post (#12) just one above this. His suggestion worked perfectly for me with an Asus Z97 Pro and a lingering "unknown device". (Re)Installing the Intel Management Engine did NOT work.
I'll type a longer story, in case some of the keywords lead more people to Halloran's post. I called Asus (812-282-2787) blindly about an "unknown device" under "other devices", hoping that they could provide a quick fix. I've heard great things about Asus from friends in IT... hopefully it extends to their reliability because the tech support was NOT good. After googling several device properties, I googled the "Hardware Ids" value of "ACPI\PNP0a0a". That brought me here, and after the Intel Management Engine driver didn't work I kept reading until Halloran's post that suggested the probe sense thermal driver. I brought up my mobo model on Asus' website (http://www.asus.com/us/Motherboards/Z97PRO/HelpDesk_Download/) and downloaded the "ASUS Probe II Sense Driver" for win 7 x64. The "unknown device" moved from other devices into system devices. I restarted, and the unknown device turned into ACPI Thermal Zone. Problem solved, I think. Thanks again Halloran, and overclock.net.
Click the spoiler here for my tech support debacle.
The tech was quite polite, just couldn't understand bland american english - and I couldn't understand her either. Once she understood I saw the unknown device in the device manager, she wanted to know if it was my router's device manager. I told her I didn't own an Asus router, which really confused her. She put me on hold to go ask if I called the right department. PARAPHRASE: Let me ask my manager if I'm the right person to help with motherboards. Apparently, the manager said yes.
I still say no.
After we both agreed that I hit "2" for motherboards, not routers, she correctly asked if everything I had plugged into the mobo was listed in the device manager. Yes. Okay, she says she has to research the problem further... she asks me for three things from the device's properties: Error code (28), Device Type (Other devices), and Manufacturer (unknown). Well, I'm no computer elite, but code 28, other, and unknown can describe way too many problems. So I asked her again, "Are you SURE that is all the information you need? I can give you more, I just don't know what you need to trouble shoot". Nope, that's it, she'll call me in 1-2 hours. That's when I started googling the properties off the details tab.. led me here, problem solved. So I call Asus again and asked to speak to her, just to let her know I found the problem, and to suggest that she recommend to her manager that they add the solution to her script. I get Jeffrey, much easier to understand... he has no clue who she is when I mention her name and other similar-sounding names, and there is nothing entered into the system under my serial number, phone number, or name. Really? Asus needs to trim their tech support staff. At least Jeffrey had the presence of mind to start a support ticket and close it. Problem solved.
pour les francais,
le driver ACPI inconnu pour les cartes meres Asus Z97 est enfait le driver de la sonde thermique et peut etre telechargé sur http://www.asus.com/us/Motherboards/Z97K/HelpDesk_Download/ en choississant dans le menu le driver correspodant à la sonde "ASUS Probe II Sense Driver"
Merci à Halloran et à Yimboli pour leur aide précieuse.
Well, thank you all, as well but does anyone know where does this driver help, besides correcting the "Unknown Device" problem, if you actually do not have the AI Suite installed?
I mean, if you do not have the AI Suite installed is it imperative to install this ASUS Probe II Sense Driver? Will something malfunction if you won't install it? And how about programs like HWiNFO64, does this affect those?
I think the issue is more of a bug with the Asus AMDA00-ACPI installer. It does create the correct folder under C:\Program Files\ASUS\AMDA\AXSP, and the AtekComSvc.exe file is generated/copied there. The issue seams to be with the installer not creating the dll (PEbiosinterface32.dll) or not successfully lining it to the hardware. Basically, go to the AMDA\AXSP folder, run the AtekComSvc.exe, delete the unknown device in the System Devices folder (in Device Manager) and reboot.
A forum community dedicated to overclocking enthusiasts and testing the limits of computing. Come join the discussion about computing, builds, collections, displays, models, styles, scales, specifications, reviews, accessories, classifieds, and more!