If you want to run Har-Bal you must have an active network device on the computer. We use it for licensing purposes. That does not mean you need to be connected to the internet. If you don’t have one or have disabled it, either re-enable it, or purchase a USB Ethernet device to use as a dongle. See below for more information. This was in the “How to Install” link on the web site where you downloaded the software from.