Need more help

We are running windows 7 and it is an e machine monitor. I have tried resetting the resolution but that does not appear to be the problem. It appears that everything expanded over the right and left sides of the monitor. Also the toolbars on internet explorer are over on the right and left sides also. I would change back if I knew what he right clicked. I have tried just about everything but am unable to figure it out. Is there anything else that would cause this?? Thanks for the help. Pat