Hey mate , try with this
1.Close all programs so that you are at your desktop.
2.Click on the Start button. This is the small round button with the Windows flag in the lower left corner.
3.Click on the Control Panel menu option.
4.When the control panel opens you change it so you are using Category view.
- Click on the Appearance and Personalization link .
-Under the Folder Options category, click on Show Hidden Files or Folders.
-Go to step 5>
5. Under the Hidden files and folders section select the radio button labeled Show hidden files, folders, or drives.
6.Remove the checkmark from the checkbox labeled Hide extensions for known file types.
7.Remove the checkmark from the checkbox labeled Hide protected operating system files (Recommended).
8.Press the Apply button and then the OK button..
9.Now Windows 7 is configured to show all hidden files.