I don't want to have to plug it in and that is why I bought a wireless one. I am afraid that I am overloading my circuits.
A wired connection won't overload your circuits any more than a wireless one.
I tried to attach the USB cord again last night because that is what I have to do to set the wireless connection but the install screen (that I need to enter the Network Key) didn't come up because I have already installed the printer.
The printer has already installed itself as a USB-connected printer so there's no reason why the install screen would come up when you connect it via USB.
I don't know my Network Key and that is/was the problem and I don't know how to reset the Network Key so it can be used as a wireless printer.
You need to find out what the network key is.
In order to do that, you have to get into your router's setup.
Usually you do that by typing the IP number of the router into your web browser and entering your username and password.
You can find the IP number of your router by typing the command
ipconfig
in a command window.
In XP, you get a command window to appear by using the Start button, then Run, then typing
cmd
in the box and OKing it or Entering it.
If you have Vista or Windows 7, you click the Start button and typing
cmd
in the Start Search, then using the Enter key.
After you type
ipconfig
in the command window and <Enter> it, you should get a bunch of information. Where it says "Default Gateway," that is your router's IP number -- the number you want to type into your web browser (web browser is Internet Explorer or Firefox or whatever you're using).
You should get a screen asking for the username and password of your router.
If you've forgotten the username and password of your router, there is a way to reset the router to defaults. But if you've had someone set up your router for you, it would probably be better to let them set up your printer or at least ask them what they did to set up your wireless network. If you reset the router, you'll have to set things up all over again.