[Closed] internet router problems, help please.

Don't know for sure, but i suspect one of my staff has been messing with the router settings, whilst trying to get the new wireless printer to talk to the router. He claims the internet just went off randomly.
Basically, the WiFi appears to be working fine, just no internet. I've unplugged everything, waited 30secs and turned it back on, ive tried starting the wizard, but got stumped at the username and password. Beyond that I don't know, could it be user names and passwords that he's got wrong and are blocking internet access or what settings, that he could meddle with, might have caused this?.[IMG] [/IMG]