To allow yourself to view all file types, open

1. Windows 7 Explorer:
2. View tab or Organize:
3. Folder and search options:
4. View tab:

• Scroll down to the Hidden Files and Folders section
• Select: "Show hidden files and folders"
• Uncheck: "Hide file extensions for known file types"
• Uncheck: " Hide protected operating system files"
• Ok the Prompt, click Apply, Ok