You can easily reset password of Linksys router, just follow these instructions:-
1. Log into your Linksys router using the Web interface. Type "http://192.168.1.1" in your browser's address bar. If you are still using the Linksys default username and password, leave the Username field blank and enter "admin" as the password. 2. Click the "Administration" tab in the Linksys interface. Under the Management subpage, you will see your current username and password, just change both to something that will be difficult for others to guess. 3. After clicking on "Save Settings" the resetting process get completed.
If still, you are facing any issue then reset your Linksys router to Factory Settings. Locate the "Reset" button on your Linksys router. On some routers, it is on the back of the device, while on others, it is on the bottom. The button is recessed in a small hole and you will need a pen or paper clip to press it. Hold the "Reset" button for 30 seconds and the Power button should blink as you do this.
Release the button, and then unplug the router from the wall for another 30 seconds. Plug the router back in. Connect your computer via Ethernet and log in to the Linksys router using the default settings. All of your settings have been erased, so you'll need to reconfigure your wireless network and set a new admin username and password.