Below is a guide on how to resolve these driver issues and restore network functionality. There is no standalone "free download" for the Microsoft Hyper-V Network Switch Default Miniport

driver from official Microsoft sites. This driver is a built-in component of the Windows operating system that is automatically installed and updated when the is enabled.

If the driver files are corrupted, the most reliable "download" method is to reinstall the Hyper-V platform via Windows Features.