What does "can't install" mean exactly? Could be anything from not turning on, can't get internet, can't logon to the thing, etc...? Try a factory default reset, should be a button on it somewhere. Or check with your friend who got one installed.
Plus "refurbished" can mean "still broken".
i got 2 of them and tryied them at my pl;ace and my girlfriends they don't work at eaither place evenmy buddy that got his working came by and tried to get it to work and it didn"t i can get on the internet and when i go to set up wizard for the router and fill in the info than hit apply it knocks me off the internet andi have to reboot the puter and reset the router Any ideas.i called aol and they said its my isp Verizon but they say its not them any ideas. sorry about the spelling not good at typing