What Is NisSrv.exe & How To Fix NisSrv.exe High Memory Usage On Windows 10

Windows PC arrives with a built-in Windows Defender utility that helps users protect computers

against viruses and potential security threats. The process, named Microsoft Network Realtime Inspection Service, aka NisSrv.exe, is a part of the Windows security tool. But what does the NisSrv.exe file do? Let’s check out the following guide:

What Is NisSrv.exe

What Does NisSrv.exe Do?

Well, according to Microsoft blogpost, NisSrv.exe is an executable application that helps users “guard their PCs against intrusion attempts with new and existing vulnerabilities in network protocols.” In layman’s terms, NisSrv.exe service runs in the background, tracks, and inspect network traffic in real-time. It constantly looks for any suspicious behavior that indicates that a hacker is attempting to exploit the security hole in a network protocol to harm your system. One such activity is detected, Windows Defender instantly shuts it down.

It immediately releases the Network Inspection Service to protect your PC temporarily. But does the service spy on me? Let’s know in detail!

Does NisSrv.exe Spy On Me?

Well, the name, Network Realtime Inspection Service, sounds a bit creepy at a glance. Still, it is just a process that keeps monitoring your network traffic for activities that can perform any attack or can be a suspicious threat to your PC. The service works similar to any standard Antivirus File Checker, that keeps a tab on the files you work with and checks if they are harmful. Similar to antivirus software, it simply gets shut down as soon as something malicious is detected.

It is undoubtedly an integral module of Windows Defender, but several users have recently reported NisSrv.exe using large portions of RAM and hampering overall system performance. You can also witness common errors corresponding to NisSrv.exe, such as:

  • NisSrv.exe has encountered a problem and needs to close. 
  • NisSrv.exe has stopped working. Windows is checking for a solution to the problem.

So, Can I Disable NisSrv.exe Service?

Well, you can’t easily disable the service to get rid of the high memory usage issue. But you can temporarily deactivate the service, and it will re-enable itself when the time comes. On the other hand, if you run any third-party antivirus solution on your system, Windows Defender automatically disables itself & so the NisSrv.exe since the majority of the antivirus programs come with their network protection components.

Best Practice To Resolve NisSrv.exe Issues

Suppose you are observing that the NisSrv.exe process is running and consuming lots of system resources. In that case, we highly recommend you install a dedicated computer cleaning utility like Advanced System Optimizer that can help you find and remove all the accumulated temp files. Additionally, it can even scan for malware and other threats. In case your Windows Defender stops working, Advanced System Optimizer is always there to give your PC ultimate protection while keeping everything working and responding smoothly without any lags.

To use Advanced System Optimizer, follow the steps below:

1. Download, Install & launch Advanced System Optimizer.

ASO Overview

2. From the main dashboard, click on the Start Smart PC Care button, located at the screen’s bottom-right corner.

3. Once the scanning process is finished, the utility will detect the faulty issues and errors that can harm your system. Hit the Optimize button to fix everything in one place!

Hopefully, this resolves nissrv.exe crashing & high memory issue. Alternatively, you can try the following methods to get rid of the issue and make your computer run smoothly.

Ways To Fix NisSrv.exe High Memory Issue On Windows 10?

Now that we have already understood that a clean and tidy system is a major requirement to avoid issues with NisSrv.exe service, our next attempts should be the following:

1. Run A System Scan

You can either run the SFC/scannow command line in the Command Prompt to find and repair corrupted system files or take the help of a reliable antivirus tool for Windows 10. We recommend using Systweak Antivirus since it is an excellent utility to perform quick and deep malware scan and give your system all-around protection.

2. Uninstall Problematic Programs

If you think you are randomly getting NisSrv.exe errors, then chances can be due to some recently installed computer applications. Hence, it is highly recommended to check which software is recently installed and pose a threat against your system. A quick tip – You can use Advanced System Optimizer for bulk uninstallation. It allows you to see all the recently installed programs in one place and the ability to uninstall one of the multiple programs in one-click. To know the Best Windows Uninstallation Software, check our previous listicle here

3. Keep A Check On Startup Items

There are a plethora of AutoStart programs that can hamper the speed and performance of your system. You can either run the command line – msconfig and check for the items you no longer need to launch at the time of boot up. You can also check our  Top 8 Startup Managers list to add, remove, and manage items without hassle.

4. Windows Update

Last but not least, you need to keep your system upgraded to the latest version to ensure no existing or new bug can make your system vulnerable or run super slow. To learn how to use Windows Update & security settings, check out our previous article right here!

People Also Ask: 

  • Is NisSrv.exe Virus Or Safe File?

No, NisSrv.exe service is not a virus. It is an integral module of Windows Defender and helps safeguard your system just like a standard antivirus utility.

  • What Is NisSrv.exe Process in Windows?

As the name entails, Microsoft Network Realtime Inspection Service is a process that keeps on monitoring your network traffic for activities that can perform any attack or be a suspicious threat to your PC.

The service works similar to any standard Antivirus File Checker, that keeps a tab on the files you work with and checks if they are harmful. Similar to antivirus software, it simply gets shut down as soon as something malicious is detected.

  • Why Is NisSrv.exe Running?  

The utility is a part of Windows Defender, and it runs in the background to protect your system from potential security threats that try to infect your PC through networks.

So, that was all! We hope our detailed guide helped you to learn better about NisSrv.exe service. If you have any questions or suggestions, feel free to shoot them in the comments section below! 



  • comment_avtar
    How to run the SFC/scannow command line

    4 years ago
  • comment_avtar
    hit windows key + r type ‘cmd’ without quotes. command line opens. type ‘sfc /scannow’ without quotes hit enter

    2 years ago
    • comment_avtar
      Srishti Sisodia
      Yes, correct.

      2 years ago

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