For that model printer, on the LCD screen of the printer if you go to menu -> settings -> device settings -> lan settings -> wlan settings
That is where you need to go to establish the wireless network connection from the printer to the router. If they is an easy setup wizard there, then choose that option. I think the only choices are using WPS or WCN. If your router has a WPS button on it, then you can select the WPS setup there and then push the button on your router to establish the connection. If your router does not support WPS, then try this alternate method to get the wireless setup.
The other method to setup wireless is to temporarily connect the printer to a laptop with a USB cable, then use the Canon LJ Network tool to configure the wireless settings. You may have the LJ network tool already on your laptop under start -> all programs -> canon LJ network utility. If you do not, you can download and install it from the canon website here.
Scroll down and select your operating system, then the tools is under the software section.
If your printer is connected with usb, when you open the tool it should see the printer and allow you to enter the wireless details by going to configuration -> wireless lan
An alternate method of establishing the network link, if your printer is located in close proximity to the router you can simply run an ethernet cable to connect the printer to the router. This is easier and more reliable, and the laptops can still print wirelessly through the network.
Let me know if you have any questions, or run into any problems trying to get the wireless connection re-established.
If you have not modified any settings yet and it worked before, you may simply try turning off the printer, unplugging the router and then plugging back in. Wait a minute and then turn the printer back on.
Now that you have connected the computer to the printer with a USB cable, you should be able to open the Canon LJ Network tool. Then click on configuration and then click on the wireless lan tab.
It should show the name of your network and the password XXXXX there. If not, push on the search button to find your wireless network and then click on the configuration button to enter the network password.
You need to get the printer connected to the network before you will be able to print wirelessly.
The menu button is located above and left of the up arrow key. Press this button, then use the left right arrows to select settings. Then use arrows again to select device settings, then lan settings, then print lan details. Let me know the link status and the IP address of the printer.
Ok, I think you are close to getting this working. Interesting that you were able to select your wireless network and it didn't change the SSID.
Try this, open the canon network tool, then go to the settings menu across the top and choose maintenance. Then click on the initialize button. This will restore the factory default settings for the printer.
Then you can go back into the configuration, and click on select and choose your network again. If you are able to get it selected this time, then print out the lan details sheet again and let me know the printer IP address. Once you get it connected you should be able to add the printer to your computers, or it may start working if they already have the printer setup as a network printer.
Ok, that sounds good. That IP address is what I would expect. Try clicking on this link, it should open a printer status page if the printer is connected to the wireless network.
The problem now is likely that the printer you have on the computer is trying to use the USB connection. Remove the USB cable if you have not already done so. Right click on the printer and choose printer properties (middle of the list in windows 7)
Then click on the ports tab. What is the name of the port with the checkbox? If it is USB0001, then you will need to re-install the printer so it uses the network connection, or you can click on new port -> standard tcp/ip port and create a new port using the IP address of the printer to create the port. 192.168.1.46
Sorry for the delay, any change in status?
The print drivers should be working correctly since it works when connected with a USB cable. You never did respond if you get to the printer status page when you click on http://192.168.1.46 ?
On the windows 7 laptop, try going to start -> devices and printers
Then click on add a printer -> add a network printer (2nd choice)
It should scan for your printer and allow you to install it. Does it find it?
Ok, that means your printer is connected to the network and you should be able to get it setup.
At this point, since it seems you have tried running the install several times and it is not succeeding, I would uninstall all the canon software and then re-install.
You can go to the control panel -> add/remove programs and remove all the canon software. Afterwards, reboot the computer and then try running the install again by going to the Canon website and select windows, and windows XP.
Then expand the drivers section and be sure to download the 2nd choice that is for networked printers. MP MX860 series MP driver for network