What is tfsnudfa?

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

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

Tfsnudfa.sys file information

The process known as Drive Letter Access Component belongs to software Sonic DLA or IBM DLA by Sonic Solutions (

Description: Tfsnudfa.sys is not essential for Windows and will often cause problems. Tfsnudfa.sys is located in a subfolder of C:\Windows\System32. Known file sizes on Windows 10/8/7/XP are 100,603 bytes (46% of all occurrences), 100,373 bytes, 100,605 bytes or 100,597 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. There is no file information. The program has no visible window. There is no detailed description of this service. The tfsnudfa.sys file is not a Windows core file. You can uninstall this program in the Control Panel. tfsnudfa.sys appears to be a compressed file. Therefore the technical security rating is 31% dangerous, however you should also read the user reviews.

Uninstalling this variant: The software publisher Sonic provides direct support ( or You could uninstall the software Sonic DLA or IBM DLA using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program).

Recommended: Identify tfsnudfa.sys related errors

Important: Some malware camouflages itself as tfsnudfa.sys. Therefore, you should check the tfsnudfa.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

AVG saw it as a rookkit, and I confirmed with ClamAV after booting linux off a liveUSB thumbdrive. AVG was not able to remove it, and using the windows default tool to remove software wouldn't remove it either. I was able to remove the files assciated with it using my live linuxUSB. After removal there were no regressions while running windows.
  Jon Tea  

Summary: Average user rating of tfsnudfa.sys: based on 1 vote with 1 user comment. One user thinks tfsnudfa.sys is dangerous and recommends removing it.

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Best practices for resolving tfsnudfa issues

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

tfsnudfa.sys [all]