What is tfsnifs?

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

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

Tfsnifs.sys file information

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

Description: Tfsnifs.sys is not essential for the Windows OS and causes relatively few problems. Tfsnifs.sys is located in a subfolder of C:\Windows\System32. Known file sizes on Windows 10/8/7/XP are 86,554 bytes (25% of all occurrences), 86,586 bytes, 86,202 bytes, 86,138 bytes or 51,444 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The process has no file description. The program has no visible window. There is no detailed description of this service. The tfsnifs.sys file is not a Windows system file. The application can be removed using the Control Panel's Add\Remove programs applet. Therefore the technical security rating is 34% dangerous; however you should also read the user reviews.

Uninstalling this variant: It is possible to uninstall Sonic DLA or VERITAS DLA from your computer using the Control Panel applet Uninstall a Program.

Recommended: Identify tfsnifs.sys related errors

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

TFSNIFS.SYS file corrupt message comes up in DELL systems if there is a driver corruption issue with the DVD drive.In that case a device driver uninstall/reinstall can help.Also we get this type of error if there is an issue with sonic my that case uninstall the sonic
  supratik chatterjee (DELL technician)  
I hve a Dell 8250. BSOD since 6 mo. old. Very intermittent. More than 100 crashes. After readind your page on tfsnifs, found file named "shell 32.dll". Size is 8253. Is this where my problem is & what do I do about it?
media center live tv crashes
American Manners
tfsnifs is also one of the file associated with the sonic dla
Again Associated with Sonic "Record Now!" software. Uninstaling the software stopped the BSOD
It's a DVD drive driver; I was unable to play a video game and finally my drive stopped working entirely. I read the article about reinstalling the driver and sure enough, it fixed the problem. No more blue screen of death and my game now works fine.
  Stacy C  
TFSNIFS.SYS is a driver related to Sonic RecordNow! Like above, uninstalling the Sonic software and reinstalling it can fix the issue. In cases I have seen, this file can become corrupted by a virus.
  John Paul D.  
Used by SONIC burning application
This file is a part of Sonic's DLA program used for making rewritable cd and dvds, but it causes crashes on some DVDRW drives. Disable that part of Sonic or get a newer driver
Uninstall Sonic software to fix
for crash analysis Dell

Rating chart

Summary: Average user rating of tfsnifs.sys: based on 11 votes with 12 user comments. 6 users think tfsnifs.sys is essential for Windows or an installed application. 3 users think it's probably harmless. 2 users think it's neither essential nor dangerous. 3 users don't grade tfsnifs.sys ("not sure about it").

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Best practices for resolving tfsnifs issues

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

tfsnifs.sys [all]