What is EIO?

EIO.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if EIO.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for EIO drivers in need of updating

EIO.sys file information

The process known as ASUS Kernel Mode Driver for NT belongs to software ASUS Kernel Mode Driver for NT or ASUS SmartDoctor by ASUSTeK Computer (

Description: EIO.sys is not essential for the Windows OS and causes relatively few problems. The EIO.sys file is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 12,288 bytes (83% of all occurrences) or 8,037 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program is not visible. The service has no detailed description. It is not a Windows core file. EIO.sys appears to be a compressed file. Therefore the technical security rating is 30% dangerous; however you should also read the user reviews.

Uninstalling this variant: You could remove the entire program ASUS SmartDoctor using Windows Control Panel.

Recommended: Identify EIO.sys related errors

Important: Some malware disguises itself as EIO.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the EIO.sys process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

Gehört zum AUS-Mainboard
  Jürgen Quast  
EIO gehört zu ASUS Smart Doctor. Der Fehler entsteht offensichtlich durch die Deinstallation. Wenn jemand einen Hinweis hat, wo der Dienst geladen wird, wäre ich dankbar. Mein Registry-Scan zeigt mir nur den EIO, nicht aber seinen Aufruf.
Is for ASUS Mainboard
  Doesn`t matter  
This combined with a 0x50 error will make t so that your computer doesn't remain on your windows desktop for very long without restarting... and it keeps restearting and restarting afterwards
It's a part of ASUS Smart Doctor (Graphics Card Overclovking and Monitoring Application) and not mandotory if you're a standard user.
  Samim Gencgel  
This file should iventify as "Asus Kernel Mode Driver". Suspect this file if you don't have Asus hardware in your computer or the size is not correct.

Rating chart

Summary: Average user rating of EIO.sys: based on 6 votes with 6 user comments. 3 users think EIO.sys is essential for Windows or an installed application. 2 users think it's neither essential nor dangerous. One user suspects danger.

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Best practices for resolving EIO issues

A clean and tidy computer is the key requirement for avoiding problems with EIO. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the EIO.sys process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

EIO.sys [all]