What is atikmdag?

The genuine atikmdag.sys file is a software component of ATI Radeon Family by ATI Technologies.
Atikmdag.sys is a system driver that belongs to the ATI Radeon Family, a brand of computer hardware and software products. Drivers enable hardware components to communicate with software without additional programming from the software developer. This is a critical file necessary for the optimal functioning of ATI hardware and should not be removed. ATI Radeon manufactures computer hardware products, such as graphics processing units, random-access memory, and solid-state drives. Radeon is currently a division of Advanced Micro Devices. It was launched in 2000. ATI Technologies Inc. was a Canadian company that developed semiconductor technology. It specialized in the manufacture of graphics processing units and chipsets. It was founded in 1985 by Lee Ka Lau, Francis Lau, Benny Lau, and Kwok Yuen Ho, as Array Technologies Industry. It was bought by Advanced Micro Devices (AMD) for $5.6 billion in 2006 as part of AMD's strategic development of its Fusion generation of computer processors. ATI and its main competitor, Nvidia, forced other manufacturers into narrower roles in the market as they achieved dominance in the graphics processor market. Today, AMD no longer uses the ATI brand name for any of their products.

ATIKMDag stands for ATI Radeon Kernel Mode Driver Package

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

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

Atikmdag.sys file information

The process known as ATI Radeon Kernel Mode Driver belongs to software ATI Radeon Family by ATI Technologies ( or Advanced Micro Devices (

Description: Atikmdag.sys is not essential for the Windows OS and causes relatively few problems. The file atikmdag.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 10,070,016 bytes (40% of all occurrences), 4,194,816 bytes, 3,544,064 bytes or 2,085,888 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program is not visible. There is no detailed description of this service. It is not a Windows core file. The file is a trustworthy file from Microsoft. Therefore the technical security rating is 19% dangerous; however you should also read the user reviews.

Recommended: Identify atikmdag.sys related errors

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

ATI/AMD Grafik Treiber
mindestens einmal am tag bricht mein Laptop zusammen und muss neu laden. er sagt immer das es mit atikmday.sys zu lösen ist.leider blicke ich gar nicht durch, was zu machen ist.

Summary: Average user rating of atikmdag.sys: based on 1 vote with 2 user comments. One user thinks atikmdag.sys is essential for Windows or an installed application. One user is not sure about it.

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Best practices for resolving atikmdag issues

A clean and tidy computer is the key requirement for avoiding problems with atikmdag. 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 atikmdag.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

atikmdag.sys [all]