What is tfswshx.dll?

Tfswshx.dll is a browser extension for Internet Explorer. This add-on enables several additional functions for Internet Explorer. You can disable it through the Extras menu (key combination Alt + X) under Manage Add-ons. The following paragraph provides more information about Drive Letter Access Component.

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Tfswshx.dll file information

The process known as Drive Letter Access Component or Direct Access Component or Sonic DLA or IBM DLA

belongs to software Sonic DLA or IBM DLA or DLA or Roxio UDF Reader or Roxio DLA or VERITAS DLA or Stomp DLA or Drive Letter Access Component

by Sonic Solutions ( or VERITAS Software ( or IBM (

Description: Tfswshx.dll is not essential for the Windows OS and causes relatively few problems. Tfswshx.dll is located in a subfolder of C:\Windows\System32 or sometimes in a subfolder of C:\Windows or in a subfolder of "C:\Program Files"—usually C:\WINDOWS\system32\dla\. Known file sizes on Windows 10/8/7/XP are 118,842 bytes (58% of all occurrences), 118,844 bytes and 6 more variants. 
This .dll file is a Browser Helper Object (BHO) that runs automatically every time you start your web browser. BHOs are not stopped by personal firewalls, because they are identified by the firewall as part of the browser itself. BHOs are often used by adware and spyware. IDs used by this BHO include 5CA3D70E-1895-11CF-8E15-001234567890. There is no information about the author of the file. The program is not visible. The tfswshx.dll file is able to change the behavior of, or monitor Internet Explorer. Tfswshx.dll is not a Windows core file. There is no detailed description of this service. The program can be removed using the Control Panel's Add\Remove programs applet. Therefore the technical security rating is 62% dangerous, however you should also read the user reviews.

Uninstalling this variant: The software vendor offers the option to do the following:
  1) uninstall the program using the Control Panel ⇒ Uninstall a ProgramSonic DLA or IBM DLA
  2) visit the support page [1][2].

Recommended: Identify tfswshx.dll related errors

External information from Tony Klein:

Important: Some malware camouflages itself as tfswshx.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the tfswshx.dll process on your PC to see if it is a threat. If Drive Letter Access Component has changed your browser's search engine and start page, you can recover your browser's default settings as follows:

Reset default browser settings for Internet-Explorer ▾
  1. In Internet Explorer, press the key combination Alt + X to open the Tools menu.
  2. Click Internet options.
  3. Click the Advanced tab.
  4. Click the Reset... button.
  5. Enable the Delete personal settings option.
This will reset your Internet Explorer to its default settings. Your browser will start with the familiar start page and search engine—without popups, ads, cookies, but all browser add-ons are deleted too [1]. Make cleaning up your browser and your computer simpler and safer with Security Task Manager.


User Comments

I found that I had a program called Sonic Update Manager in Control Panel and once I removed it my problem went away. Sonic Update Manager
  John Burgbacher  
Drive Letter Access (DLA) is a CD/DVD writing application. It is very popular mainly because it was and still is shipped with a majority of CD and DVD recording drives.
  Ax   (further information)
I have several computers Gateway ltd l 300 pent 3 and a Dell Dimension 82000 pent 4 freezes and crashes of IE8 and eventually the system needed to be totally reinstalled on both the common threads were the Veritas DLA and also Sonics record now with DLA both using this DLL it was so bad on one I had to Do a clean install. LOL never a fun thing with xp also for those of you wondering why only one of your Burners works its because the Dla only supports one Burner at a time you have to go in a switch Drive assignments from burner to burner its listed in the User manual from veritas so Beware
  Doc Jimi xmasterdarkx  
It came preinstalled with my dell laptop it allows you to copy and burn cd's and dvd's
I disabled the Sonic add-on, microsoft support wrote that it would still function outside of IE8, which is the real conflict, but it did NoT--my XP system crashed
i think it came with sonic solutio on my Dell labtop
I just installed Microsoft IE 8 and Sonic Drive Letter Access isn't compatible with this newer version of Microsoft IE 8, if you continue running this dll file on your pc you risk the chance of crashing your computer and loosing everything you have with it - Microsoft Internet Explorer 8 is willing to assist in searching for a fix to the error messege received after installation is completed of IE 8, The. Sonic is pre-installed on F "DriveLetterAccess Component" add-on version '' published by'(Not verified) Sonic Solutions' is not compatible with Internet Explorer 8.
  Cisco Steve   (further information)
it came with my dell 2400 6 years ago and i have been using it ever since. if it comes between sonic and IE 8 i will go back to IE 7
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of tfswshx.dll: based on 49 votes with 9 reviews. 32 users think tfswshx.dll is essential for Windows or an installed application. 6 users think it's probably harmless. 7 users think it's neither essential nor dangerous. 2 users suspect danger. 2 users think tfswshx.dll is dangerous and recommend removing it. 11 users don't grade tfswshx.dll ("not sure about it").

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Best practices for resolving tfswshx issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active tfswshx process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the tfswshx.dll on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.

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

Other processes

tfswshx.dll [all]