Close a group of Explorer windows simultaneously(Tips for Windows XP, Vista, 7 )

           When you open a folder from ‘My Computer’ and then navigate further into the directory structure, Windows opens several windows. It later becomes quite tedious to close every window individually.

             Deeply nested directories that are open in several windows can be quickly closed with a trick  

Activate the Explorer window for the last opened folder in the directory structure. Then, keep the [Shift] key pressed and click the icon with a cross in the title bar of this window. Windows then closes all the windows of the higher-level folders simultaneously.
Note: If you always wish to open a folder in an existing window and not in a new one  select ‘Tools | Folder Options’ in Windows and ‘Organize | Folder and Search Options’ in case of new Windows versions. Enable the option ‘Open each folder in the same window’ in the ‘General’ tab.
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source: chip plus