How to Fix Microsoft Hyper-V Network Switch Default Miniport Driver Error on Windows 8.1
If you are using Hyper-V on Windows 8.1, you may encounter a driver error for the Microsoft Hyper-V Network Switch Default Miniport device in Device Manager. This device is part of the virtual switch that connects your virtual machines to the physical network. However, sometimes it may show a yellow exclamation mark and a code 31 or code 39 error, indicating that the driver is not working properly.
This error can cause various problems, such as your network printer showing as offline, your virtual machines losing network connectivity, or your virtual switch not functioning correctly. Fortunately, there are some easy ways to fix this error and restore your Hyper-V network switch to normal.
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Method 1: Update the driver
One possible solution is to update the driver for the Microsoft Hyper-V Network Switch Default Miniport device. To do this, follow these steps:
Open Device Manager and expand the Network adapters category.
Right-click on the Microsoft Hyper-V Network Switch Default Miniport device and select Update driver.
Select Search automatically for updated driver software and wait for Windows to find and install the latest driver.
Restart your computer and check if the error is gone.
Method 2: Uninstall and reinstall the device
Another possible solution is to uninstall and reinstall the device. This can help resolve any corrupted or missing files that may cause the driver error. To do this, follow these steps:
Open Device Manager and expand the Network adapters category.
Right-click on the Microsoft Hyper-V Network Switch Default Miniport device and select Uninstall device.
Check the box that says Delete the driver software for this device and click Uninstall.
Click Action and select Scan for hardware changes. This will reinstall the device and its driver.
Restart your computer and check if the error is gone.
Method 3: Remove and recreate the virtual switch
A third possible solution is to remove and recreate the virtual switch that uses the Microsoft Hyper-V Network Switch Default Miniport device. This can help reset the configuration and settings of the virtual switch and resolve any issues that may cause the driver error. To do this, follow these steps:
Open Hyper-V Manager or Cluster Server Manager and select the virtual machine that uses the virtual switch.
Click Settings and select Network Adapter under Hardware.
Note down the name of the virtual switch that is connected to the network adapter and click OK.
Select Virtual Switch Manager under Actions.
Select the virtual switch that you noted down and click Remove.
Click Yes to confirm and click OK.
Select Virtual Switch Manager again and click Create Virtual Switch.
Type a name for the new virtual switch and select External under Connection type.
Select the physical network adapter that you want to use for the virtual switch and click OK.
Select the virtual machine that uses the virtual switch again and click Settings.
Select Network Adapter under Hardware and select the new virtual switch under Virtual switch.
Click OK and restart your computer.
We hope this article helped you fix the Microsoft Hyper-V Network Switch Default Miniport driver error on Windows 8.1. If you have any questions or feedback, please leave a comment below.[^1^] [^2^] [^3^]
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