I Forgot the Password to My Router

The Problem: You forgot the password to manage your router. Period.
Quick Fix: You have to reset the router back to its factory default settings. You'll lose all your configuration settings made on the router. On the back of most routers is a recessed button labeled "Reset." Using a paper clip, hold this button in until the LEDs on the router blink (the amount of time you need to hold the reset button may vary from router to router, so check the documentation). This will reset the router back to factory settings, enabling you to use the default username and password again. Also, many current routers allow you to save the configuration settings so you don't have to reconfigure after performing a factory reset, so check to see if your router has that capability. 

Internet Connection Tips;  I Forgot the Password to My Router