Right click on the file,|
then click on 'rename'.
|The name of the file will then|
be highlighted in blue, which you just type over.
|There you have it...|
a renamed file!!!
To do this, open up your document folder|
then go to the top and click on 'view'. Then click on 'folder options'
|Along the top, you will see some tabs...click on 'view'.
Uncheck 'hide file extensions for known file types'. Click ok, and you're done.