
A down-level computer is when the operating system of the computer has an earlier version of Microsoft Windows than the computer that you are using).

This problem may occur if any one of the following conditions is true: If you click Cancel or try to close the dialog box, the program still does not respond.

You click the Look in list in the Open dialog box.You click the Save in list in the Save As dialog box.

If you perform one of the following procedures in one of the Microsoft Office programs that are listed at the end of this article, the program may stop responding (hang) for a long time:
