Using WRTS4GS2 Cisco Router and could not access the internet. Remobed router and had instant access to the internet.

Contact your ISP. Some ISPs limit the number of computers that can simultaneously connect to your cable-modem. If you change computers, you have to tell your ISP.

Or, power-off your cable-modem, to "reset" it.
Connect the Cisco Router to the cable-modem.
Power-on your cable-modem.
Power-on your router.
Connect your computer to your router, and see if you get Internet access.