What is NisSrv.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 NisSrv.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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NisSrv.exe file information

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

The process known as Microsoft Network Realtime Inspection Service or Microsoft Network Inspection System or Microsoft Antimalware or Microsoft Security Client belongs to software Microsoft Malware Protection or Microsoft Antimalware or Microsoft Security Essentials or Microsoft Network Inspection System by Microsoft (

Description: NisSrv.exe is not essential for the Windows OS and causes relatively few problems. NisSrv.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 8/7/XP are 288,272 bytes (18% of all occurrences), 379,360 bytes and 11 more variants. 
The program is not visible. The file is certified by a trustworthy company. The file is not a Windows core file. The application can be removed using the Control Panel's Add\Remove programs applet. Therefore the technical security rating is 22% dangerous, however you should also read the user reviews.
In the event of any problems with NisSrv.exe, you can do the following:

Recommended: Identify NisSrv.exe related errors

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

ist eine Datei der Microsoft Security Essentials oder Microsoft ForeFront Client. Beschreibung Network Inspections System Client.
  Alfthe1st   (further information)

Summary: Average user rating of NisSrv.exe: based on 1 vote with 1 user comment. One user thinks it's probably harmless.

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Best practices for resolving NisSrv issues

A clean and tidy computer is the key requirement for avoiding problems with NisSrv. 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 doing a repair of your installation, or in the case of Windows 8, 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 NisSrv.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

NisSrv.exe [all]