If you can't find a dialog box that is supposed to appear here you'll find the solution.Català - Castellano
Recently my company upgraded from Autodesk Architectural Desktop 2006 to AutoCAD Architecture 2008. We found the problem that in any computer we ran AutoCAD architecture, the dialog Boxes were missing when running commands such as HATCH or calling the Layer Manager.
The problem seems to come from some sort of hardware issue. We couldn't figure out the way to solve it till we found out that the dialog boxes were not missing, but far away on the left side (outside the screen resolution area).
The solution we found might not fight the source of the problem, but it definitively worked as a solution for us.
After running a command that should call a dialog box like Hatch, we press together Alt+Space+Enter. Then press the right arrow and keep pressing it until, surprise, the dialog box appeared from the left side of the screen.
This is a basic Windows procedure, If you click Alt+Space in any explorer window you will see a dialog open with the options Restore, Move, Size, Minimize, Maximize and Close. The same happens with the Dialog Boxes in AutoCAD, but the only options in most of them are Move and Close. Since Move is the default one, by pressing Alt+Space+Enter we will have selected to move the dialog box without the need to see it. Then we will use the arrows to move it till it appears on scree.