I have a number of older, custom applications that perform long-running tasks. In previous versions of Windows the programs would become unresponsive while running a given task. Sometimes the UI would update, sometimes it would not.
Under Windows 7, however, when the UI becomes unresponsive, the entire window is greyed out and the UI is never updated so long as the task continues to run.
While this may be a result of a bad code (not spawning separate processes for long-running tasks), modifying them is not an option.
Is it possible to disable the greying/fading-out of unresponsive/busy programs in Windows 7?