Virtual Machine Bus (vmbus) Service Defaults in Windows 10
Microsoft Hyper-V Virtual Machine Bus Child Driver by Microsoft Corporation.
Default Settings
| Startup type: | Manual |
| Display name: | Virtual Machine Bus |
| Service name: | vmbus |
| Service type: | kernel |
| Error control: | normal |
| Group: | System Bus Extender |
| Path: | %SystemRoot%\System32\drivers\vmbus.sys |
| Registry key: | HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\vmbus |
Default Behavior
Virtual Machine Bus is a kernel device driver. In Windows 10 it is starting only if the user, an application or another service starts it. If Virtual Machine Bus fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the vmbus service has failed to start due to the error.
Restore Default Startup Configuration of Virtual Machine Bus
1. Run the Command Prompt as an administrator.
2. Copy the command below, paste it into the command window and press ENTER:
sc config vmbus start= demand
3. Close the command window and restart the computer.
The vmbus service is using the vmbus.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 10 installation media.