The genuine NisSrv.exe file is a software component of Microsoft Malware Protection by Microsoft Corporation. "NisSrv.exe" is a Microsoft executable, starting at Windows boot time, implementing the Network Inspection Service (NIS) that monitors incoming network traffic in real time, looking for suspicious patterns and exploits of "zero-day" vulnerabilities. The "NisSrv.exe" service resides in "C:\Program Files\Microsoft Security Client\NisSrv.exe". (The subfolder name will match the antivirus product name used in Win7, 8, 8.1, or 10 and may add "\Antimalware".) First introduced in 2012 in Microsoft Security Essentials, NIS has increased in sophistication along with the Windows Defender antivirus cloud protection service, formerly called the "Microsoft Antimalware Protection Service backend." Because it blocks network traffic it finds suspicious in real time while analyzing it or sending metadata or samples to the cloud and awaiting a response, its time and CPU overhead are unsuitable for servers, so Microsoft developed Behavior Monitoring which works asynchronously with the cloud, producing the signatures NIS needs to block incoming threats.
NIsSrv stands for Microsoft Network Realtime Inspection Service
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.
Description: NisSrv.exe is not essential for Windows and will often cause problems. The file NisSrv.exe is located in a subfolder of "C:\Program Files" (generally C:\Program Files\Microsoft Security Client\ or C:\ProgramData\Microsoft\Windows Defender\Platform\4.18.1911.3-0\).
Known file sizes on Windows 10/11/7 are 3,206,472 bytes (7% of all occurrences), 3,294,680 bytes and 157 more variants.
The process is the WdNisSvc service. The service helps guard against intrusion attempts targeting known and newly discovered vulnerabilities in network protocols.
The program is not visible. NisSrv.exe is certified by a trustworthy company. It is not a Windows system file.
Therefore the technical security rating is 29% dangerous, however you should also read the user reviews.
Uninstalling this variant:
If there are any problems with NisSrv.exe, you could do the following:
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.
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User Comments
ist eine Datei der Microsoft Security Essentials oder Microsoft ForeFront Client. Beschreibung Network Inspections System Client. Alfthe1st (further information)
WinDomain Security Shoeb Lincoln
well it seams to be part of windows essencials antivirus, but why I can't kill this procces? it says acces denied Martin
Microsoft Security Essentials is antivirus software by Microsoft. NisSrv.exe runs the Network Realtime Inspection Service, a real-time protection agent. It does not pose a threat to the system. Microsoft Security Essentials initially released in September 2009 is antivirus software created by Microsoft that offers protection against several different types of malicious software such as spyware, computer viruses, Trojan horses and rootkits. MSE replaces Windows Live OneCare and Windows Defender, and offers real time protection for several different Windows operating systems. Alex
"while analyzing it or sending metadata or samples to the cloud and awaiting a response" seems kinda fishy to me. automatically sending samples to a cloud... Sending samples to the cloud.
Summary: Average user rating of NisSrv.exe:
based on 10 votes with 6 user comments.
4 users think NisSrv.exe is essential for Windows or an installed application.
2 users think it's probably harmless.
2 users think it's neither essential nor dangerous.
One user suspects danger.
One user thinks NisSrv.exe is dangerous and recommends removing it.
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 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 executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To get your computer running as fast as it did on day one, you can 8reset your PC. Your personal files will remain intact, but any programs you installed will need to be reinstalled.
To help you analyze the NisSrv.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. A good Bantivirus software detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.
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User Comments
Alfthe1st (further information)
Shoeb Lincoln
Martin
Alex
Sending samples to the cloud.
(further information)
Summary: Average user rating of NisSrv.exe: based on 10 votes with 6 user comments. 4 users think NisSrv.exe is essential for Windows or an installed application. 2 users think it's probably harmless. 2 users think it's neither essential nor dangerous. One user suspects danger. One user thinks NisSrv.exe is dangerous and recommends removing it.