alderessy, Here's another solution which should work comliments of Toni Hackler.
Follow the instructions below exactly and your problem should be solved.
Right click the shortcut icon for IE next to the Start button, choose Properties, change it from 'normal' to 'maximized'. Now open it.
Now right click any link on the page, choose Open In New Window....don't maximize it....instead, use the mouse to resize it to what you want it to be.
Now close the FIRST window you opened, and then close the new one you just resized.
Reopen IE from the shortcut icon again, and all windows from now on will be the size you chose and created.
Note: If you don't have an IE icon next to the Start button (Quick Launch area) use the shortcut in your Start/Programs/Internet Explorer and follow the instructions above.
When i open any link with "open in new window" the new window is not full size screen window.Of course i dragged it by mouse many times and that should fix it later.It means it should be opened as it had been dragged,but that's never happened though i dragged it about a hundred time as a full screen size.What is the wrong here?