What is TFncKy.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the TFncKy.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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TFncKy.exe file information

Windows Task Manager with TFncKy
TFncKy.exe process in Windows Task Manager

The process known as TFncKy belongs to software TFncKy or TOSHIBA Controls by TOSHIBA (

Description: TFncKy.exe is not essential for the Windows OS and causes relatively few problems. TFncKy.exe is located in a subfolder of "C:\Program Files"—e.g. C:\Program Files\Toshiba\TOSHIBA Controls\. Known file sizes on Windows 10/8/7/XP are 188,416 bytes (41% of all occurrences), 184,320 bytes and 9 more variants. 
TFncKy.exe is not a Windows system file. The program has no visible window. The software starts upon Windows startup (see Registry key: MACHINE\Run). Therefore the technical security rating is 49% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you want to remove the program completely, go to Control Panel ⇒ Software ⇒ TOSHIBA Controls.

Recommended: Identify TFncKy.exe related errors

External information from Paul Collins:

Important: Some malware camouflages itself as TFncKy.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the TFncKy.exe 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

Software to allow Toshiba Laptops to use the Fn key on the laptop keyboard.
Toshiba Laptop FN key. Do not delete.
  Tim in IT  
It allows the user to use the Fn key on Toshiba laptops with the various F keys. I think, with it off, the essential ones still work (eg screen brightness), albeit with no on screen display
die datei ist zuständig, um die funktionen der mediatasten auf laptops nutzen zu können, und damit die mediaplayer zu steuern
  [LBC] Caleb  
I have lost all my Fn-key controls while having TFncKy.exe deactivated on my Toshiba laptop

Rating chart

Summary: Average user rating of TFncKy.exe: based on 10 votes with 5 user comments. 6 users think TFncKy.exe is essential for Windows or an installed application. 2 users think it's probably harmless. One user thinks it's neither essential nor dangerous. One user thinks TFncKy.exe is dangerous and recommends removing it.

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Best practices for resolving TFncKy issues

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

To help you analyze the TFncKy.exe process on your computer, the following programs have proven to be helpful: Security 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. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

TFncKy.exe [all]