Here is a tip to help you easily made hiding file extensions:

(See previous post for Windows 7 tip that is how to Restore the Menu Bar to Windows Explorer)

Step 1: Open “Computer” and press the “Alt” key to open the menu bar

 

Step 2: Click “Tools“

Step 3: Select “Folder Options“

Step 4: Select the “View” tab

Step 5: In the “Advanced settings”list, find “Hide File extensions for Known File Types” and uncheck it

Step 6: Click “OK“.

Enjoy!