This setup apparently does not use a modem, as we would normally know one, but uses a device to decode the Fiber Optical digital light signal into an electrical signal capable of being carried along ethernet cable. From there it passes into a regular wireless router which was supplied by his ISP. No DSL here, this dude has gone high tech while the rest of us are still using copper wire coming into the house!
The statement about sharing a connection actually said '' The PC should not be sharing its internet connection'' which, given that the poster has a router, should unnecessary. With a Wireless router (any router), with four ports, why would you want, or need, one of the computers to share its Internet connection?
Note that the quote is ''sharing its connection'' not sharing a connection. There is a difference.
The poster mentions that ''Unfortunately moving it up a floor isn't an option as it is based on a PC desktop downstairs.'' which would indicate that the PC is doing something that is not necessary, if the Router is actually a Router( or Gateway). Why is this setup reliant on the PC?
Configuring a computer to share its internet connection is not file sharing, as you probably know. It is where the host PC has the incoming TCP/IP signal coming into it from the modem, bridges and shares that internet signal with the other machines connected to it.
My machines also share files and printers but the internet connection is controlled by a router and not by one of the computers and each computer is not reliant on another computer for internet access.
All the computers connected to the router, beit via wireless or hard wired, are connected to the other computers by virtue of the routers switch capability. This is the method that I believe you describe as your home setup. My setup is the same. Modem/Router/Computers & Printers.
Creating the shares and setting the correct permissions allows machines on a network to share files and printers. Note though, that all that would continue to happen even if the internet connection was severed.
I think, perhaps, that you misread the post.
I agree with your suggestion regarding the use of a wireless repeater, I have made it at least three times in this thread.
Oh yes, glad to see you were amused with the thread and the statement that you misquoted, we must be fair. You had the Computer Science faculty in hysterics with your posts on the Mac forum.
P