At 07:01 PM 6/23/2007, you wrote:In my latest migration to a new computer--XP Pro SP 2--my existing XY4 installation copied over nicely with one exception. In windowed XY4, whenever I use F5 to return to the command line, the full screen goes black for an instant. Then it returns.If it's TAME, you may have to move up to a newer version.Michael Norman