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 of Link-Layer Topology Discovery Mapper I/O Driver
1. Run the Command Prompt as an administrator.
2. Copy the commands below, paste them into the command window and press ENTER:
sc config lltdio start= auto
sc start lltdio
3. Close the command window and restart the computer.
The lltdio service is using the lltdio.sys file that is located in the C:\Windows\system32\DRIVERS directory. If the file is removed or corrupted, read this article to restore its original version from Windows 8 installation media.