In the initial setup you need to connect a device to the Glowforge using the GF’s own network. Then you connect the Glowforge to your WiFi network. This may be a WiFi router or the WiFi hotspot on a mobile device. The device that connects to the GF for the initial setup can be a phone, a tablet, or a PC. As long as it has 2.4 GHz WiFi capability it will work. Once the GF is connected to your WiFi network, the setup device does not have to use the WiFi again and you will not use the GF network again unless you have to change the WiFi setup in the GF itself. I used my Android smartphone for the initial setup. There is a link to a good video here: Set up again
Once the GF is connected to your WiFi network it can be controlled from any PC that has an internet connection.