Ok, please download this firmware package:
http://archive.ubuntu.com/ubuntu/pool/main/l/linux-firmware/linux-firmware_1.187_all.deb
Save it to USB.
Boot into Zorin OS
In the app menu, open Software & Updates
Other Software Tab > select cdrom:[Zorin-OS 16 Core...
Open a terminal with ctrl+alt+t and enter in
sudo apt update && sudo apt upgrade
Hopefully... this will use the Zorin OS Installation Media as your upgrade source.
It may give 404 errors.
Once done, back in Software &Updates unselect cdrom:[Zorin-OS 16....
Insert your usb stick with the LinuxFirmware package on it and double click it to run the installer. Once that is done, please reboot and test.
