Link-Layer Topology Discovery Mapper (lltdsvc) Service Defaults in Windows 8
Creates a Network Map, consisting of PC and device topology (connectivity) information, and metadata describing each PC and device. If this service is disabled, the Network Map will not function properly.
Default Settings
| Startup type: | Manual |
| Display name: | Link-Layer Topology Discovery Mapper |
| Service name: | lltdsvc |
| Service type: | share |
| Error control: | normal |
| Object: | NT AUTHORITY\LocalService |
| Path: | %SystemRoot%\System32\svchost.exe -k LocalService |
| File: | %SystemRoot%\System32\lltdsvc.dll |
| Registry key: | HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lltdsvc |
| Privileges: |
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Default Behavior
Link-Layer Topology Discovery Mapper is a Win32 service. In Windows 8 it will not be started until the user starts it. When the Link-Layer Topology Discovery Mapper service is started, it runs as NT AUTHORITY\LocalService in a process of svchost.exe, sharing it with other services. If Link-Layer Topology Discovery Mapper 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 lltdsvc service hasn't been started.
Dependencies
Link-Layer Topology Discovery Mapper can't start, if any service from the list below is disabled or not available:
Restore Default Startup Configuration of Link-Layer Topology Discovery Mapper
Before you begin doing this, make sure that all the services on which Link-Layer Topology Discovery Mapper depends are configured by default and function properly. See the list of dependencies above.1. Run the Command Prompt as an administrator.
2. Copy the command below, paste it into the command window and press ENTER:
sc config lltdsvc start= demand
3. Close the command window and restart the computer.
The lltdsvc service is using the lltdsvc.dll file that is located in the C:\Windows\System32 directory. If the file is removed or corrupted, read this article to restore its original version from Windows 8 installation media.