When something like that happens in the future, do this:
properly shutdown your computer.
Take the router and unplug from AC power. If it has a battery also take that out.
Count to 30 or go grab a glass of water or juice or Metamucil, whatever you old guys take...
Plug the router back in and wait for all the lights to come up.
Turn your computer back on.
If all of the lights do not come back on, the cable company may be having issues. At that time call them up and go through the menus.
If all the lights do come back on but you still can't get on internet,
Start>run>type cmd and hit enter
look for IPV4 Address.............................. should be xxx.xxx.xxx.xxx where x=a number
If it starts with 169.xxx.xxx.xxx then your router is not giving you a proper IP address. That means router might be bad, try powering it down again and see if you get connectivity.