I'm glad you found a process that works for you @user7114 - (wow that username feels very dystopian )
Windows does have a default setting that hides file extensions by default, as @Gordon mentioned. This may be what's causing the difference in what you're seeing.
This is one of the first options that I change when using a computer, so I didn't even think of it.
The setting is buried in Windows 8, but I'll try to describe where its at if you want to see how your computer is set and/or change it.
- Open control panel,
- If view-by is set to categories, change it to large icons
- Within control panel, select the Folder Options icon
- Within the Folder Options dialog box, choose the 2nd tab titled view
- go to the bottom section labeled Advanced settings
- UNCHECK the option entitled Hide extensions for known file types
- click apply then ok (or just ok) to close the dialog box
You should now see the file extensions of all of the files when viewing a directory on your computer. (The extensions were always there, Windows was just being helpful and hiding them for you.)
I hope this helps.