Hi Mark, Since, this issue has started after upgrading to Windows 8.1; this could be due to the incompatible network card drivers installed on the computer. I would suggest you to install the latest Windows 8.1 compatible network card drivers and check if that resolves the issue.

DisplayLink software release 8.4 delivers: - HDCP 1.x capability on DL-6950 IC DisplayPort outputs on Windows 10 Creators Update onwards (build 15063, v1703) with. The current DisplayLink drivers (June 2017) support Windows 7, Windows 8, Windows 8.1 and Windows 10. Support for Windows XP (32bit only) and Windows Vista are available with older DisplayLink driver versions. There is no support for Windows RT versions.

Please try the following steps and let’s know the result. A) Press “Windows Logo” + “X” keys on the keyboard and select “ Device Manager” from that list. B) Locate “ DisplayLink Network Adapter” in the “ Device Manager” window, right click on it and select the option “ Uninstall”. C) On the un-installation window, if you have an option: “ Delete the driver software for this device” you may select that and then remove the incorrect drivers from the computer. D) Follow the onscreen instructions to complete the process and restart the computer, if prompted. After the restart, you may again open the Device Manager and then click on the “ Scan for hardware changes” button at the top of the “ Device Manager” window and check if Windows 8.1 detects the network card and installs an appropriate driver for it automatically.

If it is able to install the drivers automatically, then check if the issue still persists. If the issue still persists, then try the following steps to update the drivers and check the status. A) Press “Windows Logo” + “X” keys on the keyboard and select “ Device Manager” from that list.

B) Locate “ DisplayLink Network Adapter” in the “ Device Manager” window, right click on it and select the option “ Update Driver Software”. C) In the “ Update Driver Software” window, select the option “ Browse my computer for driver software” d) Now, click on the “ Browse” button and locate the drivers in the location “ C: Program Files DisplayLink Core Software CdcNcmDriver Ndis6.2.Hck81” and then click “ OK”. E) Follow the onscreen instructions and restart the computer if prompted. F) Check if that resolves the issue.

Hope this is helpful. Please get back to us with the results.

Samehadaku Naruto Episode 330. Regards, Rajesh Govind - Microsoft Support Engineer.