Windows 7: "Can't Open ACPI ATK0100 kernel Mode Driver" error at boot.

Hi, everyone.

I hope someone here can help me, as I can't seem to solve this problem I'm having.

Basically, I have two laptops here. There is my brother's Toshiba Equium L40-156, and a HP Compaq 6720s.

I made an image of the hard drive in the Toshiba laptop, and restored that image to the HP laptop. I have spent the afternoon installing most of the necessary drivers so that the OS from the Toshiba laptop can run on the HP laptop.

The error I am having, as stated in the title, is that the message "Can't Open ACPI ATK0100 kernel Mode Driver" appears every time the system loads. I have tried researching this error, but I didn't have much luck. As suggested on various sites around the web, I have tried a few versions of the driver for the display adapter ("Mobile Intel(R) 965 Express Chipset Family"), but none seem to resolve the error. Nothing in Device Manager has a triangle to indicate an error.



Any insight into the situation would be greatly appreciated.

Thanks in advance,
Tom.

I'm surprised this has worked at all for you to be honest, I wouldn't even know where to begin on all the problems you are likely to have with this scenario.

...wouldn't be surprised if authentication fails on you either.

The laptops have similar specifications, and with a few new drivers, everything seems to work flawlessly. Obviously, apart from this one error I can't seem to shake.

I can't actually tell what negative effects the error is having on the machine, if any at all. The graphics seem to work fine, aero is enabled, etc... The function keys all work as they should... It's just an annoyance having to close the error message window every time the system boots.

An older version of this,



and only found on Asus motherboards. That it got installed on the Toshiba says to me that it has an Asus motherboard in it. You're also not the only one to have the problem, only difference is this is on a Toshiba laptop,

Toshiba Support Forums: Satellite Pro L300 shows ACPI ATK0100 ...

One thing you can try to fix the error,

1. One Device manager and locate ATK0100 ACPI UTILITY

2. Right click and select Uninstall and also select "uninstall the driver software for this device"

3. Restart and check Device Manager again and it should be gone.

If the HP also has an Asus motherboard in it, it may very well still be there but only with the yellow triangle. If it does running Windows Update should get it detected and installed (has worked this way for me on any Asus board I have had).

Thanks for the info, the only problem is that I can't find anything to do with the ATK0100 ACPI Utility in Device Manager. Is there any chance it's labelled as something else entirely?

Try again with it set to show hidden and ghost devices,

Device Manager : Hidden Devices

Well, I took your advice, and I found the ACPI ATK0100 Utility in the Device Manager console!

I uninstalled and deleted this driver, but when I restarted, I found that the error still appears. Any idea on what I should do next? :/

Start with having a looking in,

C:\Windows\System32\drivers

and see if ASACPI.sys is still there, if it is Windows likely re-installed it from the DriverStore folder,

C:\Windows\System32\DriverStore\FileRepository

On mine the folder it is in is called,

atk2000.inf_amd64_neutral_a91abe245a6c41c8

with yours being an older version it may have a slightly different name; should still have the atk, but the 2000 may be different (and the number/letter combo definitely will).

If that is what happened then uninstall again through Device Manager then go to the FileRepository folder and manually delete the atk folder. Windows won't let you delete it without changing the permissions on the folder, so you can do it manually or use this (if you haven't added it already),

Take Ownership Shortcut

to add it to the context menu. Only take ownership of the atk folder and not the whole FileRepository folder.

Hopefully that should stop the error, but if it doesn't then it may take going into the registry an manually searching for and deleting any entries found for ATK0100.

Right. I see "ATKACPI.sys" in System32/drivers, and have now deleted it.

There is no folder mentioning ATK in the FileRepository. (I imagine this was deleted when I checked the 'delete this driver' box when uninstalling earlier.

I have restarted again now that I have deleted the .sys file, and the error still appears!

Maybe if we figure out what keeps trying to open it, we could disable it there? Perhaps a registry setting or something?

Let's see if setting it to disabled in the registry will do it then. Open regedit and navigate to (hopefully the same name if yours),

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\MTsensor

and in the right window locate Start, right click and select Modify and set to 4. If the above location isn't correct on yours, do a search for ATK0100 till you find it in the same,

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services

location, then make the change.