It's an annoying problem. IE gets set to open in a tiny window or something and you cannot seem to get it to stop. Here are some instructions that might help:
1) close all IE windows except one.
2) right click a link on the webpage and select 'open in new window'.
3) close the first IE window you had open.
4) resize the existing window to a size you like
5) hold down the control key and click the X in the upper right corner to close
Now open a IE session and the window should be the new size