Turn the computers, router, modem off. After about one minute turn on the modem, router, computers waiting one minute between each. Both your laptop and PC should connect to the internet.
If not, reset the router. The reset button for the router is located in a small hole in the case of the router. Using a tooth pick press the button and hold for ten seconds.
Note resetting the router will return it to it's Out of the Box state. You will need to reconfigure the admin password, and any settings you have made to the router.
Reboot your PC's and connect to the internet. i hope this will help you ..thanks