Well, to start, it'd be best if you had all files revealed:
Just be careful of what you do here. Don't mess around while in this mode- you can do some very serious damage.
With that said, here's how ya do it ;):
1. Close all programs so that you are at your desktop.
2. Double-click on the "My Computer" icon.
3. Select the "Tools" menu and click "Folder Options".
4. After the new window appears select the "View" tab.
5. Place a checkmark in the checkbox labeled "Display the contents of system folders."
6. Under the "Hidden files and folders" section select the radio button labeled "Show hidden files and folders."
7. Remove the checkmark from the checkbox labeled "Hide file extensions for known file types."
8. Remove the checkmark from the checkbox labeled "Hide protected operating system files."
9. Press the "Apply" button and then the "OK" button and close My Computer.