Sometimes,(often now) when I close an open window a black hole remains in its place.Once this starts, all icons, menu bars etc lose their colors or totally change color.If I drag a window it leaves an echo-like trail which can be black or even see-thru to a window behind.
Once this starts happening,(every 3-4hrs or so)theres no way out but reboot, or strangely if I open & run a Dos program while still in Win95, when I exit dos the screen 'pops' back to normal like nothig ever happened. Where should I begin to track this down? Any ideas?