|When I disconnected the old router and plugged in the new wireless one, the router installation software kept on telling me to check my connections because it did not detect anything plugged into it. I'm guessing that's because the computer is still set up for the old router and those settings somehow have to be disabled or removed.|
First, read the setup manual/guide that came with the new router and follow it's instructions. In all honesty, I've never once installed any goofy software that came with the router, it just isn't necesarry. Read the guide through, connect your computer to a LAN port on the router, ensure the NIC on the computer is set to get its TCP/IP settings "automatically" (from DHCP) and you should get an IP from the router and then be able to login to the management interface as per the instructions that came with it.
Once you know that the LAN side is working properly, connect the WAN port to your highspeed modem. If it doesn't work you could have a bad cable or, as I said, before, your ISP has your MAC address registered.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.