What is Nessusd.exe? Why using high CPU & How to Remove it?

  • Amar 
  • OS

nessusd.exe is an executable file that is a very important software component of Tenable Nessus which is solely developed by Tenable Network Security. Generally, the nessusd.exe file is safe and is also required for the proper functioning of many software programs related to it.

What is nessusd.exe?

Well in case Tenable Nessus security scanner is installed on your system then the nessusd.exe file comes along with it. Tenable Nessus is an exclusive network vulnerability and malware scanner that scans a wide range of technologies such as network devices, databases, operating systems, hypervisors, etc. It also provides some extra tools and features for common malware and network vulnerabilities.

File size & Location

If you are using Tenable Nessus application then nessusd.exe file location will be under C:\Program Files\Tenable\Nessus\ directory and the file size will be approx 6.57 MB. Here is brief detail:

  • File Description: Tenable Nessus
  • File Name: nessusd.exe
  • File Type : Application (.exe)
  • File Location : C:\Program Files\Tenable\Nessus\
  • File size: 6.57 MB (can vary depending on the version)
  • Publisher: Tenable Network Security
  • Publisher URL: www.tenablesecurity.com
  • Language: English

Note: nessusd.exe file is not a window signed file i.e. it does not preload with your Microsoft Windows operating system.

Usage of nessusd.exe file

nessusd.exe file is required for the proper running of the Tenable Nessus application, so you should not try to delete it if you still want enable Network Security in your system.

Is nessusd.exe safe or a virus?

Presently since nessusd.exe isn’t a window signed file and henceforth it can frequently cause issues thus you should check for its occurrence in your PC i.e. you will have to know whether nessusd.exe is a virus or not and to do so you should check for the location of nessusd.exe in your framework, the location of the file itself will assist you with knowing if it is a malware or not.

To find the location of nessusd.exe follows the methods mentioned below.

  1. Press Ctrl + Shift + Esc keys together in order to launch the Task Manager.
  2. Now check for the process saying nessusd.exe  in the process section.
  3. After you find nessusd.exe right-click on it and select the Open the file location option.

Presently on the off chance that you end up someplace under the subfolder of C:\Program Files specifically at C:\Program Files\Tenable\Nessus\, and if the location of nessusd.exe is someplace in C:\ other than the above-indicated location then there is a high possibility that nessusd.exe is not safe or say it is affected with some virus or malware.

Why nessusd.exe usage high CPU?

Well in case if the nessusd.exe is corrupted then it use high CPU or will cause your system to show irritating and annoying error messages. I have listed down some of this common nessusd.exe error notifications.

  • nessusd.exe is not a valid Win32 application.
  • nessusd.exe has failed.
  • nessusd.exe is not responding.
  • Error starting the program – Tenable Nessus.
  • nessusd.exe bad image.

On the off chance if you encounter any of these error messages then should try to fix it or in extreme situations, you must uninstall nessusd.exe from your system only when you do not require Tenable Nessus.

How to disable nessusd.exe?

To disable nessusd.exe you will have to disable the Tenable Nessus software installed on your system. To proceed further follow the steps mentioned below :

1. Press Windows + R button from your keyboard

2. Now type services.msc as shown below and click on OK


3. Now locate Tenable Nessus service > right-click > Stop

4. Next Restart your PC.

Well that’s it after disabling the Tenable Nessus application you would not see error notifications associated with nessusd.exe, however, disabling the Tenable Nessus application is not a full-time solution for nessusd.exe errors you must try to uninstall or delete the nessusd.exe file.

How to delete or uninstall fmapp.exe from the PC?

Removing any executable file isn’t constantly suggested as that will legitimately hamper or influence all the applications related to that .exe files, but however, if you are damn sure that nessusd.exe is a malware, at that point you can delete it from your framework.

To delete/uninstall fmapp.exe from your PC follow the steps which I have mentioned beneath.

1. Open the Control Panel.

2. Now under the Programs section click on Uninstall a Program as shown below.

Uninstall a program

3. Now among the list of installed applications find the Tenable Nessus application and right-click on it and select the option of Uninstall/Change.

4. Follow the prompts to uninstall it.

Well, that’s it, if you have followed the steps carefully then Tenable Nessus is probably uninstalled from your system.

Conclusion: This was all you should know about the nessus.exe. I hope you find this information valuable and interesting.

Other similar files:

vsnpstd3.exe, TrGUI.exe, ngentask.exe, nvvsvc.exe, Bfsvc.exe


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