Windows Vista Services

Link-Layer Topology Discovery Mapper I/O Driver - Windows Vista Service

Link-Layer Topology Mapper I/O Driver by Microsoft Corporation.

This service also exists in Windows 10, 7 and 8.

Startup Type

Windows Vista edition without SP SP1 SP2
Starter Automatic Automatic Automatic
Home Basic Automatic Automatic Automatic
Home Premium Automatic Automatic Automatic
Business Automatic Automatic Automatic
Ultimate Automatic Automatic Automatic

Default Properties

Display name:Link-Layer Topology Discovery Mapper I/O Driver
Service name:lltdio
Error control:normal

Default Behavior

The Link-Layer Topology Discovery Mapper I/O Driver service is a kernel mode driver. If Link-Layer Topology Discovery Mapper I/O Driver fails to start, the error is recorded into the Event Log. Windows Vista startup proceeds, but a message box is displayed informing you that the lltdio service has failed to start. If you disable this service, then 2 other services will be unable to start (see the "Dependencies" section below).


If the Link-Layer Topology Discovery Mapper I/O Driver is stopped, the following services will not start and initialize:

Restore Default Startup Type of Link-Layer Topology Discovery Mapper I/O Driver

Automated Restore

1. Select your Windows Vista edition and Service Pack, and then click on the Download button below.

2. Save the RestoreLinkLayerTopologyDiscoveryMapperIODriverWindowsVista.bat file to any folder on your hard drive.

3. Right-click the downloaded batch file and select Run as administrator.

4. Restart the computer to save changes.

Note. Make sure that the lltdio.sys file exists in the %WinDir%\system32\DRIVERS folder. If this file is missing you can try to restore it from your Windows Vista installation media.

Yea, though I walk through the valley of the shadow of death, I will fear no evil: for thou art with me; thy rod and thy staff they comfort me.