What is nsiproxy?
The genuine nsiproxy.sys file is a software component of Microsoft Windows Operating System by Microsoft Corporation.
"Nsiproxy.sys" is Microsoft's Network Store Interface Proxy Service driver, located in "C:\Windows\System32\drivers" It operates in kernel mode. The Network Store Interface Service (NSIS) keeps track of the computer's available network interfaces and stores and shares their routing information with other services. NSIS will not start if "nsiproxy.sys" is not running. Failure of "nsiproxy.sys" is often caused by failure of a device attached to the system, which can include network cards or USB ports. If the file itself appears to be corrupted an intact file can be copied from a similar Windows version into "C:\Windows\System32\drivers", followed by a restart.
NSIProxy stands for Network Store Interface Proxy Service Driver
Nsiproxy.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc.
The free file information forum can help you determine if nsiproxy.sys is a Windows system file or if it belongs to an application that you can trust.
Run a free scan to check for nsiproxy drivers in need of updating
Since 2005, file.net has researched facts about Windows processes and files, analyzed user experiences, and examined files using its own analysis tools. Around 10,000 users rely on it every day.
Nsiproxy.sys file information
The process known as NSI Proxy belongs to software Microsoft Windows Operating System by Microsoft (www.microsoft.com).
Description: The original nsiproxy.sys is an important part of Windows and rarely causes problems. The file nsiproxy.sys is located in the C:\Windows\System32\drivers folder.
Known file sizes on Windows 10/11/7 are 16,384 bytes (40% of all occurrences), 16,896 bytes or 29,696 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs.
It is a Windows core system file. It is a Microsoft signed file. The program has no visible window.
nsiproxy.sys appears to be a compressed file.
Therefore the technical security rating is 0% dangerous; but you should also compare this rating with the user reviews.
Recommended: Identify nsiproxy.sys related errors
Important: Some malware disguises itself as nsiproxy.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the nsiproxy.sys 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.
Best practices for resolving nsiproxy issues
A clean and tidy computer is the key requirement for avoiding problems with nsiproxy. 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 nsiproxy.sys 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.
Other processes
vm332sti.exe reflectservice.exe gui.exe nsiproxy.sys vcsystemtray.exe incd.exe mwldaemon.exe videochannel.exe swenum.sys vbc.exe genietimelineservice.exe [all]
Score
User Comments
Alex (further information)
Vincent
Summary: Average user rating of nsiproxy.sys: based on 2 votes with 2 user comments. 2 users think nsiproxy.sys is essential for Windows or an installed application.