Network printer not showing up in the web browser

I am using Windows 10 on some systems, and Windows 7 on others.
I can't see my printer when I type its IP address, and the driver is NOT locating the printer on some computers, even when I use its IP address. However, it is working from other computers on the network.
I can see the printer when I go to another computer and I see the router and all the devices connected to it, but NOT from every computer.
I have the router connected to a 16 port switch.
How can I configure the network so that the printer works with all the computers where the driver is installed.

Thanks dalchina:

But I had already done all of those things.
All of the computers were previously working with an older router & switches.
Most of the computers are already connected to the internet, and some are working with the printer.
When I query the router, I can see some of the computers, but not all, but even some of the computer that I do see are NOT connecting to the printer.
The printer & its IP are showing up when I query the router.

Try removing the printer from Devices and Printers and then adding it back again. I think it may be because the IP assignments have changed since you changed routers.

Also, if the computers are not set as "Private" networks, you want be able to see them... A "Public" network makes them hidden. And IP mess ups will use a default Public network.

Thanks MisterEd:
I will double check that ALL of the computers are on a Private Network,but I suspect that they are since they were all working in the past at some point.
I do have the latest drivers on each system, however, if the computer cant see the printer, it won't install the driver anyway.
So far, of the 14 computers, only 4 are NOT connecting to the network. Of the 14 that are connected to the internet, I can't print from 5 of them.
My router also has 4 ports, and I go into a 16 port switch after that.
I will go back through this again sometime on Tuesday.

Thanks guys for all of your suggestions.

BTW MisterEd.
Are you using a managed switch?

[QUOTE=Fabler2;25671
Also in Devices @ Printers, add a printer and select 'the printer that I want isn't listed' for more options if required.
[/QUOTE]
Good advice, it allows you to setup the printer as a TCP/IP printer, using a TCP/IP port and not the standard WSD port.