This is the second computer, with the second windows version, that is giving me this routine regularly; no one ever mentions the problem; it can't be just me, can it? I'm constantly having all the control "buttons" (minimize, maximize, close, and any choice selection buttons in a particular program) disappear into smears of random color. Annoying anytime, and a real pain if I have to restart so I can tell if I have checked any choice buttons. Is there a reasonable way to straighten this out?