What is ati2mtag?

The genuine ati2mtag.sys file is a software component of ATI Radeon Family by ATI.
The ATI Radeon Family is a brand of computer hardware and software products. Ati2mtag.sys is a critical driver that is required for the optimal functioning of ATI hardware and software 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.

ATI2Mtag stands for ATI 2D Mobility Radeon Driver Package

Ati2mtag.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 ati2mtag.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for ati2mtag drivers in need of updating

Ati2mtag.sys file information

The process known as ATI Radeon WindowsNT Miniport Driver or ATI Radeon Miniport Driver belongs to software ATI Radeon WindowsNT Miniport Driver or ATI Radeon Family by ATI Technologies (

Description: The original ati2mtag.sys is an important part of Windows and rarely causes problems. Ati2mtag.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 3,565,056 bytes (11% of all occurrences), 1,540,608 bytes and 17 more variants. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The ati2mtag.sys file is a Windows system file. The program has no visible window. The service has no detailed description. The ati2mtag.sys file is a Microsoft signed file. Therefore the technical security rating is 9% dangerous, however you should also read the user reviews.

Recommended: Identify ati2mtag.sys related errors

Important: Some malware disguises itself as ati2mtag.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the ati2mtag.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

it's keeping XP pro for powering down: gives "safe to shutdown windows" message. Found this little sweetheart with event viewer.
  thank you!  
couseing blue screen error
  Ivan Nikitovic   (further information)
Ati system drivers component
see article 737-23733 on AMD/ATI support knowledgebase for problems associated with at12mtag
  dungib   (further information)
Source: ati2mtag, causes this error and reboots my PC: CPLIB :: HDCP - Failed HDCP key binding verification
It is a part of the ATI Display Drivers (Mobility Radeon im my case)
  Michael Postmann  
certain error messages are thrown by media player classic
  da wolf  
Standard in the windows xp driver package, addresses ATI graphic cards and/or ATI chipsets
Causing my system to reboot randomly. But it seems an essential part of video software, Am lookin for different version.
it is an ATI driver that is writing errors in event viewer
  leroy jenkens   (further information)
IDT Hook 0x01, 0x03 seit ATI version 7.12
The Ati Mobility Radeon asks this file though this file is in the instalation program.
  George, Athens Greece  
I noticed than it is an important file and maybe causing Windows unstable if deleting it. I thinked.
IT WILL NOT ALLOW ME TO UPgrade to newer radeon drivers,it gets right to the point of loading the ati2 file..and then it asks for the ati disk(video) which i \,like all the others cannot find ..and i have the original disk for the abitat832x board,i have the catalyst driver disc that came with the radeon video card..I mean it seems that it should be on these?..i really wish i could get some help here.....thanks....eddie,a all u folks that are having this prob,run sata/raid...i'm thinking (from dubbin around for 2 day with this that the uli sat raid is invoved?..i dunno
  Eddie Clark  
It's infected at a friends PC, don't know if I should delete
  Roberto Strife  
videodrav radeon
vga controller
I have ATI Radeon 4600 HD series running in an old but kept computer, and it is an ATI related sys file. I would say to keep it, or re-install drivers if a problem.
Appears to be causing frequent reboots of WinXP SP3 following installation of a cloned boot drive (clone is just larger disk and installed as replacement for original boot drive).
  Ralph E. Wild  

Rating chart

Summary: Average user rating of ati2mtag.sys: based on 31 votes with 20 user comments. 20 users think ati2mtag.sys is essential for Windows or an installed application. 6 users think it's probably harmless. One user thinks it's neither essential nor dangerous. 3 users suspect danger. One user thinks ati2mtag.sys is dangerous and recommends removing it. 8 users don't grade ati2mtag.sys ("not sure about it").

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Best practices for resolving ati2mtag issues

A clean and tidy computer is the key requirement for avoiding problems with ati2mtag. 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 ati2mtag.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

ati2mtag.sys [all]