If you are connected wired, identify the 'Local Area Connection' icon in the System Tray (see image). Double-clicking on it will bring up the window 'Local Area Connection', which should say 'Connected'.
If you are connected wireless, identify the 'Wireless Connection' icon in the System Tray (see image). Double-clicking on it will bring up the window 'Wireless Connection', which should say 'Connected'. Go to
this page to solve wireless connection problems.