Microsoft Multi-Path Bus Driver - Windows Vista Service
MultiPath Support Bus-Driver by Microsoft Corporation.
This service also exists in Windows 7.
Startup Type
Since Microsoft Multi-Path Bus Driver is a kernel mode driver, its startup might be configured depending on installed hardware. Changing its startup configuration might cause hardware issues. In the table below you can see how it is configured on my system, but your default settings might differ from mine.
| Windows Vista edition | without SP | SP1 | SP2 |
|---|---|---|---|
| Starter | Disabled | Disabled | Disabled |
| Home Basic | Disabled | Disabled | Disabled |
| Home Premium | Disabled | Disabled | Disabled |
| Business | Disabled | Disabled | Disabled |
| Ultimate | Disabled | Disabled | Disabled |
Default Properties
| Display name: | Microsoft Multi-Path Bus Driver |
| Service name: | mpio |
| Type: | kernel |
| Path: | %WinDir%\system32\drivers\mpio.sys |
| Error control: | normal |
| Group: | Boot Bus Extender |
Default Behavior
The Microsoft Multi-Path Bus Driver service is a kernel mode driver. If Microsoft Multi-Path Bus Driver fails to start, the error is recorded into the Event Log. Windows Vista startup proceeds, but a message box is displayed informing you that the mpio service has failed to start.
Restore Default Startup Type of Microsoft Multi-Path Bus Driver
Automated Restore
1. Select your Windows Vista edition and Service Pack, and then click on the Download button below.
2. Save the RestoreMicrosoftMultiPathBusDriverWindowsVista.bat file to any folder on your hard drive.
3. Right-click the downloaded batch file and select Run as administrator.
4. Restart the computer to save changes.
Note. Make sure that the mpio.sys file exists in the %WinDir%\system32\drivers folder. If this file is missing you can try to restore it from your Windows Vista installation media.