Norton wont Update Cause of proxy

Whevener i open up Norton and then i got to "fix now" to update it to the newest version, this message comes up...

 

Unable to connext to network proxy server. Please check your norton proxy settings.

 

How do i either get to the proxy setting to fix this, or what do i need to do so this can be fixed. Im running norton 360 5.0 and through a lynskys router. I am doing this for my grandmother so please make this as simple as it can be so i can explain it to her fairly simpley. Thanks.