Link-Layer Topology Discovery Mapper I/O Driver (lltdio) Service Defaults in Windows 8

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

Default Settings

Startup type:Automatic
Display name:Link-Layer Topology Discovery Mapper I/O Driver
Service name:lltdio
Service type:kernel
Error control:normal
Group:NDIS
Path:%SystemRoot%\system32\DRIVERS\lltdio.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lltdio

Default Behavior

The Link-Layer Topology Discovery Mapper I/O Driver service is a kernel device driver. In Windows 8 it is starting automatically during the operating system startup. If Link-Layer Topology Discovery Mapper I/O Driver fails to start, the error details are added to Windows 8 error log. When the operating system startup is complete, the user is being notified that the lltdio service hasn't been started.

Dependencies

All the services listed below will not start if Link-Layer Topology Discovery Mapper I/O Driver is disabled:

Restore Default Startup Configuration for Link-Layer Topology Discovery Mapper I/O Driver

1. Select your Windows 8 edition and update pack, and then click Download.

2. Save the Win8_lltdio_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The lltdio service is using the lltdio.sys file that is located in the %WinDir%\system32\DRIVERS folder. If the file is corrupted or deleted, you can put it back in there.