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.
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 (www.sonic.com) or VERITAS Software (www.veritas.com) or IBM (www.ibm.com).
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.
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 ▾
The following programs have also been shown useful for a deeper analysis: ASecurity Task Manager examines the active tfswshx process on your computer and clearly tells you what it is doing. Malwarebytes' well-known Banti-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 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.