Close Windows automatically as they open with Window Closer. Use the software to close any popup windows or even to enable or disable buttons on application. The Window Close can be used on Windows XP, Vista or even on Windows 7 and the trial version can be downloaded free now. Have a close look at the screenshot of the Window Closer as displayed on the right hand side. The Window Closer lists application windows which are open at the time the screenshot was taken. Window Closer displays non minimised windows and the Display All checkbox can be used to display all the windows open on your computer. Button, Label, Checkbox and other controls are referred to as in the document as Windows.