If I am playing Fallout 3 GOTY when another application puts up a dialog box on the desktop (e.g. Java auto updater needs permission) then I am subsequently unable to return to Fallout 3. Sometimes the desktop is shown (at wrong resolution) but clicking the Fallout icon on the taskbar just displays a wide but minimum height empty window (just the usual window decorations). Sometimes I can just see the dialog box but have no mouse cursor. Usually I can use task manager to kill Fallout 3.
The OS is Vista 32-bit. The desktop screen resolution is 1680x1050 but the game runs at 1280x800 for performance reasons.
I've had similar problems with other full-screen games.
Is there any way to prevent this problem or to recover from it so that I can resume the game?