What is rspndr?

The genuine rspndr.sys file is a software component of Link-Layer Topology Discovery Responder by Microsoft.
This driver file is designed for the Network Driver Interface Specification to allow the Windows operating system to communicate with certain network interface cards. It is included in every release of Microsoft Windows, and is critical to any programs that require interfacing with the NDIS API. Founded in 1975, Microsoft's flagship product is the Windows operating system, which is installed on over 90% of workstations worldwide.

Rspndr stands for Link-Layer Topology Responder Driver for NDIS

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

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

Rspndr.sys file information

The process known as Link-Layer Topology Responder Driver for NDIS (version 6) belongs to software Link-Layer Topology Discovery Responder by Microsoft (

Description: Rspndr.sys is not essential for the Windows OS and causes relatively few problems. The file rspndr.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 62,336 bytes (68% of all occurrences), 62,848 bytes, 60,928 bytes or 60,416 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. The file is not a Windows core file. rspndr.sys appears to be a compressed file. Therefore the technical security rating is 16% dangerous; however you should also read the user reviews.

Recommended: Identify rspndr.sys related errors

Important: Some malware disguises itself as rspndr.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the rspndr.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

rspndr.sys is Microsoft Windows link-layer topology responder driver that should be located in the C:\Windows\System32\drivers directory.
%windir%\system32\DRIVERS\rspndr.sys versucht, auf das Netzwerk / Internet zuzugreifen. Warum?

Summary: Average user rating of rspndr.sys: based on 3 votes with 2 user comments. 3 users think rspndr.sys is essential for Windows or an installed application. One user is not sure about it.

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Best practices for resolving rspndr issues

A clean and tidy computer is the key requirement for avoiding problems with rspndr. 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 rspndr.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

rspndr.sys [all]