Link-Layer Topology Discovery Mapper I/O Driver (lltdio) Service Defaults in Windows 7
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
Link-Layer Topology Discovery Mapper I/O Driver is a kernel device driver. In Windows 7 it is starting automatically on the operating system startup. If Link-Layer Topology Discovery Mapper I/O Driver fails to start, Windows 7 attempts to write the failure details into Event Log. Then Windows 7 startup should proceed and the user should be notified that the lltdio service is not running because of the error.
Dependencies
If Link-Layer Topology Discovery Mapper I/O Driver is stopped, the following services cannot start:
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 7 installation media.