How to Find Vendor and Model of Unknown Drivers

Try USBDeview to get the vendor ID, then look it up on a vendor list here or here

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Or use Device manager to find the vendor ID

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There is also a utility called chip genius referred to on this page .

There is a detailed explanation on a fix in the article Broken WAN Miniports. I suggest very carefully reading that article, for below I only give a short summary.

Uninstall the non-working miniport

1. In Device Manager, right-click on the non-working miniport, choose Update Driver.
2. Choose Browse my computer.
3. In the next window, choose Let me pick driver from a list.
4. Uncheck Show compatible hardware. From the Manufacturer list, choose Microsoft, and from the Network Adapter list, choose MAC Bridge Miniport. (It can be any device the user is allowed to uninstall.)
5. Back in the device manager, delete the device that just turned into a MAC Bridge Miniport.
6. Reboot.

Reinstall the miniports

1. Get devcon.exe. Remember that a 32-bit version won't work on 64-bit systems. Getting the 64-bit version is described here.
2. Go to command prompt run as administrator and go to the directory where you extracted devcon.exe

3. The above article describes how to install many types of miniports, but I believe that you only need to install the Network Monitor:

   devcon.exe install c:\Windows\inf\netrasa.inf MS_NdisWanBh

   If running the command reports "driver install" failure, don’t pay it attention.

4. Reboot.

Safety notes

Before starting these manipulations, take backups of all your data. Then create a system restore point, so in case of a problem you could rollback Windows to its actual state.

Ensure also that the .inf file C:\Windows\inf\netrasa.inf does in fact exist.

If this doesn't work for some reason, an alternative approach is described in the article Re-installing WAN miniport devices, that does however require registry work.