Dell 966 All In One Photo Printer - Manual (Page 63)

You should verify that your adapter can communicate over the network before completing installation of the printer
software.
If the adapter was successfully configured and is available on the network, remove the USB cable, and click Next
to continue with printer software installation.
If the adapter was not able to join the wireless network, try one of the following suggestions:
Click View Settings to verify the settings are correct.
Select I want to change the settings I entered, and then click Next.
Follow the instructions on your screen to update the wireless settings.
Select I have moved my wireless printer closer to the wireless router. I would like to try
connecting again, and then click Next.