To reset your Nighthawk log in password, access the router's web interface by typing "routerlogin.net" or "routerlogin.com" into your browser's address bar. Enter your current username and password (default is "admin" for both unless changed). Navigate to "Settings > Administration > Set Password" and enter your old password followed by your desired new password twice. Click "Apply" to save changes. If you've forgotten your current password, you may need to perform a factory reset by pressing the reset button on the router for 10 seconds. For more detailed instructions, visit the Nighthawk login support page.