What is nsbu.exe?

The genuine nsbu.exe file is a software component of Norton Security with Backup by Symantec.
Norton Security with Backup is a cross platform security and performance optimization software suite. Nsbu.exe runs the Norton Security with Backup program. This is not an essential Windows process and can be disabled if known to create problems.

Norton Security with Backup is a program that provides security from viruses, hacking, data loss, identity theft and Internet scams. The application features threat detection and removal, manual or scheduled system-wide backup into local or cloud-based storage, privacy protection, parental control, and more. Norton Security with Backup is available for up to 10 devices running Microsoft Windows, Mac OS X, Android, or iOS, with a single license.

Symantec is an American company that develops and distributes security, storage and systems management solutions and offers services that support its software. It was established in 1982 by Dr. Gary Hendrix, a specialist in the processing of natural languages and artificial intelligence. Symantec was initially funded by a monetary grant by the National Science Foundation and later through venture capital firms. It is currently a Fortune 500 company. Symantec is headquartered in Sunnyvale, California.

NSBu stands for Norton Security with Backup

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 nsbu.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.

Click to Run a Free Scan for nsbu.exe related errors

Nsbu.exe file information

Windows Task Manager with nsbu
Nsbu.exe process in Windows Task Manager

The process known as Norton Security with Backup belongs to software Norton Security with Backup or Norton Security by Symantec (

Description: Nsbu.exe is not essential for the Windows OS and causes relatively few problems. Nsbu.exe is located in a subfolder of "C:\Program Files (x86)"—usually C:\Program Files (x86)\Norton Security with Backup\Engine\\. Known file sizes on Windows 10/8/7/XP are 289,080 bytes (33% of all occurrences), 326,144 bytes and 7 more variants. 
It is a background process, and the service name is NSBU: Norton Security with Backup.
The file is a Verisign signed file. It is certified by a trustworthy company. Nsbu.exe is not a Windows core file. The program is not visible. The application listens for or sends data on open ports to a LAN or the Internet. Therefore the technical security rating is 8% dangerous; however you should also read the user reviews.

Uninstalling this variant: You may also turn to the software developer, Symantec, for advice or uninstall Norton Security with Backup or Norton Security software via Windows Control Panel/Add or Remove Programs (Windows XP) or Programs and Features (Windows 10/8/7).

Recommended: Identify nsbu.exe related errors

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

hogs cpu for minutes at a time
  Bernie Ryan  
Gehört zu dem Symnatec Produkt Norton. Es ist empfohlen die Datei nicht zu löschen in den meisten Fällen. Wenn sie Norton installiert haben, und sie nicht finden, dann sollten sie nach schädlichen Dateie suchen, denn manche Viren löschen Norton wenn sie die Chance bekommen.

Summary: Average user rating of nsbu.exe: based on 1 vote with 2 user comments. One user thinks nsbu.exe is essential for Windows or an installed application. One user is not sure about it.

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Best practices for resolving nsbu issues

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

nsbu.exe [all]