How do you reconfigure linksys router

Hi  

Try Linksys support....or RTFM...

All the best Brett  

Factory reset   there should be a small button you can press with a pin.
Then login to the router via its IP address on a web browser, it will most likely be 192.168.0.1
login with default credentials (should be on the router)
Edit settings  

as david_w said, look at on your router's bottom side, there should be information stored with router IP address and its username and password, enter the IP in your browser's address bar then a window shows up with user and pass, enter them and happy configuration.