The brightness controls also do show up in the Device Manager, so there might be a way of making it work, but unfortunately I cannot tinker with that since I do not have the admin privileges of my work laptop

Hello everyone,I have owned the LG Ultrafine 4k for a few days, since the COVID-19 pandemic made work from home mandatory for most Canadians. I love the display, but was struggling to connect it to my work laptop (which doesn’t have USB-C).After hours of research, 7 different adapters,The Wacom Link Plus for Cintiq Pro 13/16 (ACK42819) takes the Mini Display Port signal from your Windows computer and convert it to a USB-C DP-Alt mode signal that your LG UltraFine will recognize.This adapter even has a supplemental USB Micro-B to USB-A cable that you can connect to your Windows computer so that the speaker work.The display controls such as brightness can be controlled by this Windows app . It doesn't require that the Micro-B USB cable be plugged to the Wacom, as it uses the DCC protocol over DisplayPort.The LG Display remembers the brightness from your Mac so you can control it from there by disconnecting the Windows laptop and connecting it to your Mac if like me you cannot install the app on your work computer.Below is a picture of how you need to plug the Wacom!Note that the HDMI port will not work. Also the UltraFine 4K will work at full resolution, but the UltraFine 5K (2019 and later) will max out at 4K.Cheers!