|Windows (on each computer) only allows you to connect to the internet one way at a time; at least, I know of no way to connect more than way at a time to one ISPs one account.|
You were connected via USB - you have to change that to via a wired network adapter connection, when you are using one.
(When you are connected via a single wired connection to the modem, you have to do this as well if you change to a single wireless connection to the modem (if the modem is both wired/wireless - I have not seen one). When you have a router between the computers and the modem, all of the connections to the router can connect to the internet once one connection to the internet has been set up, but you can only use one type of connection between the computers and the router, so you stll have to do this on the computer you change the type of connection on.)
When you change the type of wired network connection (or change it from wired to wireless or visa versa) to the internet, you have to go to Tools - Internet Options in IE (or to Control Panel - Internet Options),
select the Connections tab, click on Setup at the top, and select the appropriate settings.
In your case, with the USB wired adapter installed properly on the desktop (follow the installation directions - e.g. you often have to install software for it, THEN you plug it in, or it won't install properly - you may be required to reboot the computer at some point as well before the adapter will actually work), and with the adapter connected by cable to the modem , you would
choose Connect to the Internet on the first screen (where you can select something)
- 2nd - Getting Ready Screen - what you choose depends on your ISP situation - in my case I would choose Setup a connection manually
- 3rd - Internet Connection screen - in my case, and probably yours, my Broadband connection is always on, so I would choose that.
(When you connect through a router to the modem the settings you choose are slightly different - you choose connect to the internet through a local network (LAN), which in turn connects to the modem).
You MAY need to look at the manual for the modem, and change some setting, but I didn't have to do that at a place I help out that has a Motorola cable modem that has both a USB and a RJ45 port.
If the ISP required TCP/IP network settings for your network adapter are the default Windows ones like mine are, your internet connection should then work, but you may have to reboot the computer first.
If the ISP required TCP/IP network settings for your network adapter are NOT the default Windows ones, your internet will NOT work, until you set those TCP/IP settings to those settings required by the ISP.
You change those by going to Control Panel - Network connections (or My Network Places - Network connections)
RIGHT click on the adapter with name of the USB adapter, choose Properties
double click on Internet Protocol (TCP/IP), change the default settings to those the ISP requires.
In my case, my ADSL ISP (Telus, in Canada) uses default settings for those. The biggest local cable ISP (Shaw) also uses default settings there.
For the ADSL ISP, I, or software on my behalf, must submit the MAC address (the unique identifier code all network devices divulge when queried) to them of at least one network adapter or other networking device. The first time you set up a connection using the ISPs supplied software, that's done automatically. This ISP allows you to register two MAC addresses, max
- e.g. you can have two computers, each with their own network adapter, connected via them connectioning via cables to/through a network hub or switch, connected via a network cable to the ADSL modem.
If you change network adapters the MAC address changes - you have to either run the ISP's software again, or go to a specific site on the web that works regardless of whether you can connect to the internet otherwise and change the MAC address there, or register a second MAC address there if you want to do that.
When you connect through a router to a modem to the ADSL ISP, or through a combo modem/router, the situation is different. The ISP (and anyone else accessing your computer from the web) can normally only see one networking device (unless both ends use remote access software, or bad guys utilize security flaws in the Windows software) - you either use the MAC address of the router or router/modem, or you CLONE the MAC address of a single computer's adapter e.g., that you have a network cable connected to at the time, or you can simply enter a MAC address of an adapter that has already been registered with the ISP.
In my case I started out with just one connection to the internet, via a network card connected by cable to a modem.
When I later connected a router (when I found out the advantages of using one) between the computer and the modem, I cloned the MAC address of that same network adapter in the router's configuration.
Now I have as many as 4 computers connected to a wired router at a time, or as many as 5 computers to a wirelss router at a time (the routers have had 4 wired ports; I have had one wireless connection as well sometimes ) - if they had more ports, or more computers with more wireless adapters, I could connect more computers, or you can connect more network hubs or switches to the router, etc., etc.
Ever since the first time, I have either cloned the MAC address of the original adapter in a router's config, or I have entered it manually. I can then plug any computer into the router, or into any hub or switch connected to the router, without having to register a new MAC address or add one. I can swap routers that already have been setup with the right MAC address and settings as I please. The ISP has no idea how many computers I have connected, but on the other hand, there's never more than myself and my Dad using a computer at the same time at my place.
The cable ISP only requires the serial number of the Motorola modem be registered with them, which is apparently divulged if it's queried - it also has a MAC address, which other ISPs may require you register.
(the ADSL modem has a MAC address too, but it's not used by my ISP). When you use the ISPs software to set up the connection that's done automatically. You can connect any networking device to the modem without having to fuss with re-registering anything, and the ISP is not concerned with whatever MAC address the router is set to if you're using one. You only have to re-register the serial number if you change which cable modem you are using.