It's been awhile since my last post but I found a solution to secure my Linksys Wireless-B Router BEFW11S4. First power down all devices (laptop, modem, and Router), then connect an ethernet cable to the modem's ethernet port, then to the Linksys ethernet port. Using another ethernet cable, connect to #1 on the routers ethernet port, then connect the other end directly to the back of your laptop, now power up all devices. You should now have internet connection. Reset your Router to factory default. Go to Linksys website at www.linksys.com (if you haven't done so yet make sure you download the latest firmware), under the "Support" tab click on "Technical Support", click "Choose A Product", at the far left column under "Search Model" enter model number "BEFW11S4", click go or choose from "Select Product Category". In the "Support Tools" box, click on "EasyLink Home Networking Tools", click "EasyLink Connect", you can save to Program Files for future use. This program will now allow you to change your SSID, assign a new Encryption Key, Turn On Wireless Security, and Security Mode. For this model (BEFW11S4) only WEP security mode allowed, since it is an older model WPA mode is not allowed. Your router should now be secured and you can now remove the ethernet cable directly connecting your router and computer, it is no longer needed but make sure your Notebook Adapter is connected to your computer. However, although router is secured I was still unable to change the default Router Administrator Username and Password, when I key in the web browser "http://192.168.1.1/"
, enter "admin" as password it will get me to the main Setup page but applying changes continue to prompt Username and Password box. Hope this helps many of you who are looking for a solution to this problem!