Can you be clearer with your description of the problem please.
There are several parts in the chain for an internet connection.
Is the Router connected ok to the Internet? (is the light on the router lit up for Internet)
Using an Ethernet cable is the pc able to see the the Router?
Are you able to go to the Router's Homepage (depending on make of Router is is something like 192.168.1.1 – or the IP address your router uses) ClickHere for instuctions
WiFi: On the Router is the light lit up for WiFi?
Do the laptops list the router name when you search for 'Available Connections'?
Do you get any error messages?