Are you maybe using a wireless connection? That might be your LAN
I resolved this problem by doing two things 1. in the Control screen...under Programs and features... I selected and repaired MS .Net Framework client profile. 2. under Network and Sharing center I enabled Discovery and File sharing. I have a VISTA...hope this helps.
|Internet Connection Icon in System Tray||Vista General|
|Internet Connection with a seperate Media Sharing Connection?||Vista networking & sharing|
|Internet connection icon in notification area||Vista performance & maintenance|
|Internet connection icon||Vista General|
|UPNP and Internet Connection Icon||Vista General|