I should have clarified that I am trying to setup my printer on my WiFi. It is not discovered by hp-setup or the HP Tool Box app when either attempting to use the 2nd (discover wifi printer with either automatic discovery or by manual IP address) or the 3rd (discover wifi printer while connected to USB cable) installation options. Also during installation of both HPLIP and HPLIP-GUI there was an error message stating that they are not compatible with Zorin OS. [SOLVED] The trick in my case was to first install the HP DeskJet 3755 All-In-One Printer-Scanner in Windows 11. Once bound to my WiFi router, I reverted back to a disk image that I had made prior to installing HDLIP and HDLIP-GUI (either the versions available in the Zorin repo or those available from the HP Linux Developer site). I then simply ran sudo apt-get update; then sudo apt-get install hdlip-gui; then ran hd-setup 192.168.1.112 (i.e. the static IP assigned by my router to my HP DeskJet) et voila! It installed both printing and scanning capabilities - all controllable via HDLIP Toolbox (the app installed by hdlip-gui). I hope that this post helps other quadruple-boot system owners.