If your computer shows you the little yellow triangle (limited connectivity) then you might have to reset the source of your internet, the modem if you can access it, by unplugging the power for 30 seconds. then reset your router by unplugging the power for 30 seconds so it can aquire a new IP address if you get the internet through dynamic settings. The router could also have a bad ethernet internet port. If you can connect to the router wirelessly and tried resetting it and if you can get internet being directly hooked up to the modem or source of internet such as a wall outlet...then your router may be bad.....if it is a Belkin...then it was junk to begin with.