What is nisum.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 nisum.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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Nisum.exe file information

The process known as Norton Internet Security NISUM or Norton Internet Security Stats or User Manager belongs to software Norton Internet Security or Symantec Client Firewall by Symantec (

Description: Nisum.exe is not essential for the Windows OS and causes relatively few problems. Nisum.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 140,536 bytes (25% of all occurrences), 87,720 bytes and 5 more variants. 
The program has no visible window. It is a Verisign signed file. Nisum.exe is certified by a trustworthy company. The file is not a Windows core file. Nisum.exe is able to hide itself. Therefore the technical security rating is 14% dangerous, however you should also read the user reviews.

Uninstalling this variant: You could also uninstall Norton Internet Security or Norton Personal Firewall from your computer using the Control Panel applet Uninstall a Program.

Recommended: Identify nisum.exe related errors

External information from Paul Collins:

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

Collects information about data passing through Norton Firewall
nvsvc32.exe is a process that belongs to the NVIDIA graphics card drivers. This process should not be removed to ensure that your graphics card drivers is working properly.

Summary: Average user rating of nisum.exe: based on 2 votes with 2 user comments. 2 users think nisum.exe is essential for Windows or an installed application.

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Best practices for resolving nisum issues

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

nisum.exe [all]