What is TFNF5.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 TFNF5.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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TFNF5.exe file information

Windows Task Manager with TFNF5
TFNF5.exe process in Windows Task Manager

The process known as TFnF5 belongs to software TOSHIBA Hotkey Utility for Display Devices or Toshiba Hotkey Utility for Display Devices by TOSHIBA ( or Toshiba (

Description: TFNF5.exe is not essential for the Windows OS and causes relatively few problems. TFNF5.exe is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 73,728 bytes (65% of all occurrences), 622,592 bytes and 7 more variants. 
It is not a Windows system file. The program is not visible. The TFNF5.exe file is an unknown file in the Windows folder. The program starts when Windows starts (see Registry key: MACHINE\Run). TFNF5.exe is able to record keyboard and mouse inputs. Therefore the technical security rating is 60% dangerous, however you should also read the user reviews.

Recommended: Identify TFNF5.exe related errors

External information from Paul Collins:

Important: Some malware disguises itself as TFNF5.exe, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the TFNF5.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

This is a fils that installs when adding Toshiba drivers for the Hot-Key function. Not at all dangerous.
is used for switching output screen on Toshiba notebooks, FN-key+F5 shows a window for screen selecion, keeping FN pressed, you can rotate in there with F5...
  Ronald W.  

Rating chart

Summary: Average user rating of TFNF5.exe: based on 11 votes with 2 user comments. 9 users think TFNF5.exe is essential for Windows or an installed application. 2 users think it's neither essential nor dangerous.

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Best practices for resolving TFNF5 issues

A clean and tidy computer is the key requirement for avoiding problems with TFNF5. 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 TFNF5.exe 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

TFNF5.exe [all]