you need
  • of Windows.
Guide
1
To be able to change file extension, you have to turn it on display in the file manager Windows.By default, this option is turned off, and to change it is necessary to bring to the screen one of the components of the "Control Panel" OS.In Windows 7 and Windows Vista, it is convenient to do with the internal search engine - open the main menu and start to type the word "Folder."After the first three letters, you can check out this link and activate "Folder Options" in the search results.This can
also be done from the keyboard - just press Enter.
2
Setting the display of file extensions placed on the tab "View" - go to her, and in the "Advanced Options", scroll to "Hide extensions for known file types."Check the box next to this line, and then click OK.
3 Navigate to the file, extension that you want to change using the "Explorer» Windows.By default, a link to the start is fixed on the taskbar latest version of the operating system, but you can use a combination of "hot keys» Win + E. Search for a file, enable editing its name, using an item "Rename" from the context menu or functionF2 button on your keyboard.Move the insertion point to the end of the name (key End) and then edit expansion .Then turn off the edit mode, pressing Enter.
4
can use to change the extension and the file properties window.To call him the object you click the right mouse button and then click the bottom line - "Properties".The full name of the file is placed in the edit box in the "General" tab of the properties window - fix it extension and click OK.