How to fix linksys security problem

[renatez]

how can I fix this on my Linksys router;
it says that imfomation sent over network might be visible.
Where do I set it to secure this router?

 

[Dark Lord of Tech]

http://www.youtube.com/watch?v=DhNAsnqnHWc

 

[Dark Lord of Tech]

http://www.linksysbycisco.com/static/us/Learning-Center/Network-Security/How-to-Secure-Your-Network/index.html

 

[renatez]

Best answer selected by renatez.