Fix Can't open AsIO3.sys error on ASUS computers

Some Asus users have experienced an error – Can’t open AsIO3.sys when working on their Windows 11/10 computer. This error can prevent you from using your computer because the system can’t access this file. When this error occurs, something is wrong with the registry entries or system files linked to the operating system. In this article, we explain the reasons why the AsIO3.sys file may not be accessible and how you can fix the issue.

Can’t open AsIO3.sys! Failed error code 433, A device which does not exist was specified

A full system scan, driver updates, and removing newly installed programs can help fix this issue. Read on to learn everything you need to know about AsIO3.sys error on ASUS computers and how to fix it.

What Is AsIO3.sys and why is it not opening?

AsIO3.sys is a driver designed specifically for ASUS computers. AsIO stands for Asus Input Output. As part of the preinstalled software on your ASUS computer, this application monitors RAM temperature and GPU unit speed. It also controls other hardware, such as internal fan speeds. This tool makes it easy to monitor and manage your ASUS computer by notifying you when hardware issues occur.

Users have reported an error message saying “Can’t open AsIO3.sys” when they try to start their computer. Several factors can cause this error, including malware infections, failing hard drives, and corrupted memory. Check out this article if you are experiencing this error on your ASUS computer.

Fix Can’t open AsIO3.sys error on ASUS computers

If you can’t open AsIO3.sys error on ASUS computers, follow the suggestions below. Before you apply these methods, be sure to back up your data in case something goes wrong and your data gets lost.

Reinstall the driver or the ASUS software
Disable or Uninstall Asus TUF Armoury Crate
Update your device drivers
Run System File Checker
Perform System Restore

Let’s take a closer look at each method:

1] Reinstall the driver or the ASUS software

This method requires you to reinstall the driver or the Asus software that includes or installs this AsIO3.sys file

2] Disable or Uninstall Asus TUF Armoury Crate

The solution to this problem is to disable or uninstall the Asus TUF Armoury Crate & Aura Creator. Following are the steps you can take to uninstall all Armoury Crate apps and services:

Open the web browser and navigate to the Armoury Crate support website.
On the Driver & Utility tab, click on the drop-down menu.
Here you will find two options, Windows 11 64-bit or Windows 10 64-bit, choose whichever option suits your needs to download Armoury Crate Uninstall Tool.
Click on the Download button to get the file.
Once you download it, open File Explorer (Windows+E keys) and go to the Downloads folder.
Unzip “Armoury_Crate_Uninstall_Tool.zip” and double-click “Armoury Crate Uninstall Tool.exe” to start the uninstall process.
After the uninstallation completes, restart the system.

Note: The official AC cleaning tool is the best way to remove the Armoury crate.

3] Update your device drivers

A faulty or outdated driver may also cause this Blue Screen error. In such a case, you have two options to choose from:

Update your driver manually through the Device Manager.
Go to Windows Update and get the driver updates under the Optional Updates section.
You can also download the latest driver version via the manufacturer’s website.

4] Run System File Checker

If the above solutions don’t work, your system may be corrupted. To resolve system file corruption, you can use the System File Checker utility using the following steps:

To get started, launch the Command Prompt as an administrator.

In the Command Prompt, copy and paste the following command:

sfc /scannow

Now hit the Enter key and it will then scan the system for any corrupted files. When the scan is finished, restart your PC and see if the problem is solved

5] Perform System Restore

This solution is highly effective at fixing many problems on Windows PCs, including BSOD errors like this. So, if nothing helps, simply restore your system to its previous state. This will restore your system to a state where it was functioning properly.