When installing a new printer I have had issues with the new printer not appearing in Control Panel – “Devices and Printers”.
If the PC is behind a proxy server and does not have direct web access then it can take a few minutes or a reboot for the printer to appear.
I discovered Windows is trying to download the correct icon for the particular printer.
If you change a reg setting it will prevent doing an icon lookup and the printer will appear instantly.
If you know what I mean, give it a try and see.
You can edit the registry here: