The rspndr.sys process is a driver file that is referred to as Link-Layer Topology Responder Driver for NDIS, which is a part of the Link-Layer Topology Discovery Responder software, a product developed Microsoft Corporation for Windows PCs. The Link-Layer Topology Discovery Responder or LLTD Responder application is basically a type of kernel driver, which is usually installed in Windows XP, Windows Vista, and Windows 7, and is used by the Network Map feature for the purpose of displaying a graphical representation of wireless LAN (WLAN), or a local area network (LAN), as well as other devices on the network, including their connection via LLTD protocol. In case the LLTD Responder has failed to execute, any error is recorded in the Event log of the computer, indicating the rspndr.sys process is unable to load. Moreover, the rspndr.sys file must remain stored on the system and running in the background to ensure Link-Layer Topology Discovery Responder works.

Most non-system processes that are running can be stopped because they are not involved in running your operating system. rspndr.sys. is used by Link-Layer Topology Discovery Responder, If you shut down rspndr.sys, it will likely start again at a later time either after you restart your computer or after an application start. To stop rspndr.sys, permanently you need to uninstall the application that runs this process which in this case is Link-Layer Topology Discovery Responder, from your system.

After uninstalling applications it is a good idea to scan you Windows registry for any left over traces of applications. Registry Reviver by ReviverSoft is a great tool for doing this.

The ReviverSoft experts have not yet reviewed rspndr.sys

A process usually a part of an installed application such as Link-Layer Topology Discovery Responder, or your operating system that is responsible for running in functions of that application. Some application require that they have processes running all the time so they can do things such as check for updates or notify you when you get an instant message. Some poorly written applications have many processes that run that may not be required and take up valuable processing power within your computer.

We have not received any complaint about this process having higher than normal impact on PC performance. If you have had bad experiences with it please let us know in a comment below and we will investigate it further.

The first thing you should do if rspndr.sys. is causing errors on your computer is to run a Windows registry scan with Registry Reviver If you are still seeing errors after this you should uninstall the program that rspndr.sys, belongs to, in this case Link-Layer Topology Discovery Responder