Composite Bus Enumerator Driver (CompositeBus) Service Defaults in Windows 11
Multi-Transport Composite Bus Enumerator by Microsoft Corporation.
Default Settings
| Startup type: | Manual |
| Display name: | Composite Bus Enumerator Driver |
| Service name: | CompositeBus |
| Service type: | kernel |
| Error control: | normal |
| Group: | Extended Base |
| Path: | %SystemRoot%\System32\DriverStore\FileRepository\compositebus.inf_amd64_8cf6fa9d3afdfa25\CompositeBus.sys |
| Registry key: | HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CompositeBus |
Default Behavior
Composite Bus Enumerator Driver is a kernel driver. In Windows 11 it starts only if the user, an application or another service starts it. If Composite Bus Enumerator Driver fails to start, the failure details will be recorded into Event Log. Then Windows 11 should boot up and notify the user about the CompositeBus service startup failure.
Restore Default Startup Configuration of Composite Bus Enumerator Driver
1. Run the Command Prompt as an administrator.
2. Copy the command below, paste it into the command window and press ENTER:
sc config CompositeBus start= demand
3. Close the command window and restart the computer.
The CompositeBus service is using the CompositeBus.sys file that is located in the C:\Windows\System32\DriverStore\FileRepository\compositebus.inf_amd64_8cf6fa9d3afdfa25 directory. If the file is removed or corrupted, read this article to restore its original version from Windows 11 installation media.