|It sounds like something has been messed up in your TCP/IP settings either on your PC, or on the router itself. If your computer gets it's TCP/IP settings automatically (from DHCP0 from the router, then you may need to reset the router to it's factory default and reconfigure it.|
First though, I would try rebooting it. Power it down for a 10 count, then plug it back in. Then, reboot your PC and see if it doesn't start working properly. If it does, problem solved. If it doesn't, then you may need to redo the router.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.