MBB Network Adapter Class Extension - Windows 10 Service
Windows Mobile Broadband Class Extension by Microsoft Corporation.
This service also exists in Windows 11.
Startup Type
| Windows 10 version | Home | Pro | Education | Enterprise |
|---|---|---|---|---|
| 1507 | not exists | not exists | not exists | not exists |
| 1511 | not exists | not exists | not exists | not exists |
| 1607 | not exists | not exists | not exists | not exists |
| 1703 | not exists | not exists | not exists | not exists |
| 1709 | not exists | not exists | not exists | not exists |
| 1803 | not exists | not exists | not exists | not exists |
| 1809 | Manual | Manual | Manual | Manual |
| 1903 | Manual | Manual | Manual | Manual |
| 1909 | Manual | Manual | Manual | Manual |
| 2004 | Manual | Manual | Manual | Manual |
| 20H2 | Manual | Manual | Manual | Manual |
| 21H1 | Manual | Manual | Manual | Manual |
| 21H2 | Manual | Manual | Manual | Manual |
| 22H2 | Manual | Manual | Manual | Manual |
Default Properties
| Display name: | MBB Network Adapter Class Extension |
| Service name: | MbbCx |
| Type: | kernel |
| Path: | %WinDir%\system32\drivers\MbbCx.sys |
| Error control: | normal |
Default Behavior
The MBB Network Adapter Class Extension service is a kernel mode driver. If MBB Network Adapter Class Extension fails to start, the error is logged. Windows 10 startup proceeds, but a message box is displayed informing you that the MbbCx service has failed to start.
Dependencies
MBB Network Adapter Class Extension is unable to start, if the Network Adapter Wdf Class Extension Library service is stopped or disabled.
Restore Default Startup Type of MBB Network Adapter Class Extension
Automated Restore
1. Select your Windows 10 edition and release, and then click on the Download button below.
2. Save the RestoreMBBNetworkAdapterClassExtensionWindows10.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 MbbCx.sys file exists in the %WinDir%\system32\drivers folder. If this file is missing you can try to restore it from your Windows 10 installation media.