I have been using my Epson XP 635 for three or four years with no problem. When I went to print something today, there was no printer option listed on the 'Print to' list. On checking 'Device and printers', the printer symbol was not ticked as default. It has a small logo of two people where the tick would normally be. I tried to install a new printer, the laptop found the printer and listed it. I clicked to install, the installation started, but then a message popped up 'unable to install'. I have tried numerous ways but it still will not install. Any help with ideas would be appreciated.