How do I prevent people from using Windows “common dialogs” as little Explorer windows?
Most Windows programs use the standard Windows “common dialogs” to open or save files. Presenting the same dialogs in all programs means that the user does the same thing in the same way in all programs. This is good. However, by default these Open and Save dialogs let the user right-click on any displayed file or program and change its attributes, or even run it. They also let the user delete selected files with the Delete key. This is bad. To plug these security holes, check the box on the Input Control tab labeled “Lock down Windows Explorer, the desktop, and open/save screens.” This will disable right-click menus and the Delete key in these common dialogs. They are also disabled in Explorer and on the Windows desktop.