computer won't recognize MX870 as a printer/scanner, only as a fax

We have 2 computers on our home network; both laptops running windows 10.  One computer recognizes and works with the MX870 printer, and one only sees it as a fax.  I have uninstalled the "fax" device from the computer and tried to reinstall, but it will only install it as a fax and still won't recognize it as a printer/scanner.  I have rebooted the router, and the printer; turned off the antivirus, but nothing changes the problem. This computer used to be able to connect and print with this printer. We don't know what changed.  One thing we have also noticed, and it has been an issue for a long time, is we have to re-set the printer connection to the wifi almost daily. It didn't start out this way and I don't know why it continually drops this connection.