You can download the driver from ASUS website. Before you get started, ensure that you know the PC model name and the specific version of Windows that you are using. The driver can be downloaded from the Driver & Tools section of the Support site for your PC model. When you go there, you are required to select the operating system to what you have on your computer. Then look under Utilities. There should be an ATKACPI driver listed. Download and install this. After installing the driver, reboot computer, and the error message should be gone.
If you have difficulty with downloading the driver manually, you can use Driver Easy to help you.
Driver Easy can scan your computer and detect all problem drivers, then give you a list of new drivers. Since ASUS ATK0100 ACPI driver is missing on your computer, Driver Easy can detect it and find the latest driver for you. To download the driver, all you need to do is click your mouse 2 times. To resolve the problem, you don’t need to have much driver knowledge. And you will save much time on it.
Driver Easy has Free version and Professional version. Both versions can be used to download drivers. But if you use Free version to update the driver, you are required to install the driver step by step. And with Professional version, no further steps are necessary. After download completes, the driver will be installed automatically.