In Windows Vista and up, when you try to move, delete, or rename a file that is locked, Explorer will display a File In Use dialog that lets you Retry or Cancel.
The problem is that this dialog is not in the Alt-Tab list so you cannot switch to it easily. If you triggered it from an Explorer window, then not only can you not switch to the dialog, even the Explorer window will be removed from the Alt-Tab list so that you cannot even switch to that anymore.
This is extremely frustrating because if you have switched to another window, then it seems like the only way to access the File In Use dialog is to use the mouse to minimize overlapping windows to see it. That can be difficult/annoying/impossible when using just the keyboard for whatever reason.
Does anyone know of an easy way to get at the File In Use dialog with thee keyboard?