Steps:
1. Open any Windows Explorer window and select Tools->Folder Options from the menu bar.
(http://pad3.whstatic.com/images/b/b9/Hide-Files-in-Windows-Step-5.jpg)
2. Select the 'View' tab. Then scroll down and make sure that 'Show hidden files and folders' is selected.
(http://pad2.whstatic.com/images/e/e3/Hide-Files-in-Windows-Step-6.jpg)
3. Click 'Apply', and 'OK', and now you will be able to see all hidden files on your computer, denoted with a transparent icon, rather than a fully opaque one.
(http://pad1.whstatic.com/images/d/df/Hide-Files-in-Windows-Step-7.jpg)
[Source-Internet]