I don't see exactly the situation you're in, but in general you can drag an active window around by putting the mouse in the title bar (the blue bar at the top) and holding the left mouse button pressed.
If that doesn't work in this case, please tell in detail what you do, and what you want to do.
I have win 98 on a dell dimension. I have lost sound and can't play cds. I apparently have to re-install something, but can't because the window where I have to check the components I want is covered by the window that says install. Any way to separate these windows? Thanks much