Tonight's entertainment was that my Adobe Photoshop CS 5.1 wouldn't start. It turned out that there was a dialog about a bad Samsung monitor calibration that I had been able to click through in earlier versions and ignore that was now both present and completely inaccessible. The only thing to do was to kill Photoshop in Task Manager which did nothing for getting my work done.
But I applied my Google-fu and eventually:
By the time I'd done the last of these things, Photoshop would run again.