Jack has an Epson All-in-One printer and he can't scan to his computer. It says all the channels are blocked. Leo says that he can scan over wifi with today's wireless printer scanners. But it's network scanning, and a firewall may be blocking it. Turn off the software firewall in the OS. He doesn't need it if he has a router. Then, open up the computer to the printer in the menu and let the printer make the connection.