Ever found that for some odd reason, your desktop icons (url's) now opens in a smaller window and you can't figure out why! Well this has happen several times for us, and could not figure out what to do, until I came accross this:
Internet Explorer remembers how the browser was closed and opens the same way. For instance, if you close IE "Restored Down" to a smaller window, it will open the next time Restored Down to the smaller window.
To get your desktop icons (url's) to open at full screen, open a webpage. Stretch it out to fullsize. Don't use maximize. Choose any link on that webpage and right-click, it will then open in a new window. Stretch that second window out to the desired size- don't use maximize. Close the first IE window. Then close that second resized window.