What is nsiproxy?

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

Nsiproxy.sys file information

The process known as NSI Proxy or NSI proxy service driver belongs to software Microsoft Windows Operating System by Microsoft (

Description: The original nsiproxy.sys is an important part of Windows and rarely causes problems. Nsiproxy.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 16,896 bytes (57% of all occurrences), 16,384 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 is not visible. nsiproxy.sys appears to be a compressed file. Therefore the technical security rating is 0% dangerous, but you should also take into account 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.


User Comments

If the NSI proxy service driver is stopped, the Network Store Interface Service fails to start and initialize.
  Alex   (further information)

Summary: Average user rating of nsiproxy.sys: based on 1 vote with 1 user comment. One user thinks nsiproxy.sys is essential for Windows or an installed application.

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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, 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 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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

nsiproxy.sys [all]