What is tnslsnr.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 tnslsnr.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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Tnslsnr.exe file information

The process known as Oracle Database (version 10g Express Edition) or OracleXETNSListener belongs to software Oracle Database (version 10g Express Edition, 10g Express) or HSPM or AccessData Oracle (version 10g) or PL/SQL Developer by Oracle (

Description: Tnslsnr.exe is not essential for the Windows OS and causes relatively few problems. The tnslsnr.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 204,800 bytes (42% of all occurrences), 208,896 bytes and 18 more variants. 
It is a file with no information about its developer. The program has no visible window. The file is not a Windows system file. The process listens for or sends data on open ports to a LAN or the Internet. Therefore the technical security rating is 66% dangerous, however you should also read the user reviews.

Uninstalling this variant: You can do the following:
  • look for help on the [1][2] website
  • remove the entire program Oracle Database 10g Express or Oracle Database 10g Express Edition using Windows Control Panel

Recommended: Identify tnslsnr.exe related errors

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

Oracle TNS Listener process
  Martin Fuchs  
Oracle - Listener file
  G Azevedo  
Run this file if you want others to be able to connect to your Oracle database
installed on database server
  Angel Perez   (further information)
This is part of Oracle
  John E. Moore   (further information)
Oracle TNS Listener
    (further information)
Oracle Listener - not dangerous
to get rid of this badboy, stop and/or disable the 'OracleXETNSListener' Windows service
if you are running a database on your computer you need listner.exe
It's the listener executable of the Oracle Database Server
  Benito Vivancos Cayuela   (further information)
is this is a virus
Not a Virus - This process is needed if you want the Oracle Database to be able to share its data. Some installed applications may lose functionality or crash if disabled, but should be generally regarded as non-essential for normal Windows users.
tnslsnr.exe is essential if: 1) oracle is installed 2) you have a database running on the machine 3) you need to connect to the database from other servers. If oracle is installed, but only being used as a client, there is no need for the listener service to be running. There is also no need to delete the program, just disable the services. The listener services is normally only setup if there is a database on the machine, so if the oracle installation is client only then having a listener setup is likely a mistake.
  Jared   (further information)

Rating chart

Summary: Average user rating of tnslsnr.exe: based on 18 votes with 13 user comments. 15 users think tnslsnr.exe is essential for Windows or an installed application. 2 users think it's neither essential nor dangerous. One user suspects danger. 2 users don't grade tnslsnr.exe ("not sure about it").

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Best practices for resolving tnslsnr issues

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

tnslsnr.exe [all]