What is ndisrd?

The genuine ndisrd.sys file is a software component of Windows Packet Filter Kit by NT Kernel Resources.
A product of NT Kernel resources, this system file runs in the background and is a driver for network tools. It supports the NT Kernel Resources network packet filter. Packet filters analyze each individual piece of network traffic and decide whether or not to let it pass, either incoming or outgoing. Ndisrd.sys starts with Windows. If the file is disabled, network traffic will be effectively unsecure.

NDisRD stands for NT Distribution RD helper driver

Ndisrd.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 ndisrd.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for ndisrd drivers in need of updating

Ndisrd.sys file information

The process known as NDISRD helper driver belongs to software Windows Packet Filter Kit or NDIS packet redirector driver by NT Kernel Resources (

Description: Ndisrd.sys is not essential for Windows and will often cause problems. Ndisrd.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 18,944 bytes (44% of all occurrences), 22,016 bytes, 22,912 bytes or 15,340 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. There is no detailed description of this service. It is not a Windows system file. Therefore the technical security rating is 46% dangerous, however you should also read the user reviews.

Recommended: Identify ndisrd.sys related errors

Important: Some malware camouflages itself as ndisrd.sys. Therefore, you should check the ndisrd.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

my system detected it as a trojan horse which could not be repaired
  Leng Gador  
Trojan.Interrupdate Trojan
  Mary   (further information)

Summary: Average user rating of ndisrd.sys: based on 2 votes with 2 user comments. 2 users think ndisrd.sys is dangerous and recommend removing it. One user is not sure about it.

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Best practices for resolving ndisrd issues

A clean and tidy computer is the key requirement for avoiding problems with ndisrd. 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 repairing of your installation or, for Windows 8 and later versions, 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 ndisrd.sys 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

ndisrd.sys [all]