Ok Guys Lets find out how we can unhide the extension of file, if it’s not visible. These steps will be same for all files in Windows 7, Windows Vista and in Windows Server 2008.
Go to the location of the file
Then go to Organize and click “Folder and Search Options”
Folder option page will open as below
Then Select View TAB and uncheck option which marked in Red (Hide Extensions for known file types) then click apply and ok.
Here we go 🙂 Now File is show as test.txt with extension