Computer can connect to Internet, but other devices can't?

[Martigan]

If you are trying to connect with mobile devices, forget the network settings and try to reconnect.
I'm guessing the problem isn't that simple though. Try going into router settings and doing a full reset of the router. It will take some time to remake the password, but the devices should connect afterwards.
If the devices are connecting but not receiving internet, then double check the router settings to make sure it's functioning correctly as a wireless router, and not a repeater or something like that.

If you are on a home network, resetting the router settings can take as much as five minutes, if your in charge of a companies internet, you may want to be more careful with settings set up in the past.