What is dmio?

Dmio.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 dmio.sys is a Windows system file or if it belongs to an application that you can trust.

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

Dmio.sys file information

The process known as NT Disk Manager I/O Driver or E/A-Treiber für NT Datenträgerverwaltung belongs to software Logical Disk Manager Driver or Treiber für die Verwaltung logischer Datenträger by Microsoft Corp., Veritas Software (

Description: The original dmio.sys is an important part of Windows and rarely causes problems. The file dmio.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 153,344 bytes (85% of all occurrences), 154,112 bytes or 153,856 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. It is a Windows system file. The program has no visible window. The service has no detailed description. The file is a Microsoft signed file. dmio.sys appears to be a compressed file. Therefore the technical security rating is 4% dangerous, however you should also read the user reviews.

Recommended: Identify dmio.sys related errors

Important: Some malware disguises itself as dmio.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the dmio.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

computor is saying "dmio.sys is corrupt"
  Michael Noble  
In Windows Server 2003 controls the I/O request processes. If it can't handle to many requests the OS stop, while it's starting.
  Hector W Velez   (further information)
pc is saying " The file dmio.sys is corrupted Press any key to continue
From many many errors from my computer!
for window
My dmio driver has been disabled forever and I have no problems running without it.
I get the message dmio.sys is corrupt, installation Installation of Windows halted
It talks to the Partition table in the MBR so that USB / HDD / FDD File system drivers. Attended Windows Core concepts training
dmi motherboard id memory modules dmi bios properties system video version

Rating chart

Summary: Average user rating of dmio.sys: based on 13 votes with 10 user comments. 8 users think dmio.sys is essential for Windows or an installed application. 2 users think it's probably harmless. 2 users think it's neither essential nor dangerous. One user thinks dmio.sys is dangerous and recommends removing it. 3 users don't grade dmio.sys ("not sure about it").

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Best practices for resolving dmio issues

A clean and tidy computer is the key requirement for avoiding problems with dmio. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic 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 6resmon 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 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the dmio.sys process on your computer, the following programs have proven to be helpful: ASecurity 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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

dmio.sys [all]