Show hidden files in Windows 7

Well this is going to be a common question, so let’s make it simple:
1. Start Button
2. Control Panel

4. Click on Appearance and Personalization

5. Click on Folder Options

6. Go to the tab View
7. Check “Hidden files and folders: Show all files and folders”

8. Uncheck “Hide protected operating system files (Recommended)”
9. Click “Apply” and then “OK”

source:http://windows7themes.net/how-to-unhide-hidden-files-in-windows-7.html