How many times, you want to open and see the contents of a file not associated with any program. You can use Notepad to view the contents of such a file. It is even better if you add Open with Notepad to the right-click context menu, so you can easily open any file in Notepad. Here is how :
Download AddOpenWithNotepad.zip to your Desktop. Extract the contents of the Zip file to a folder. Double-click on OpenWithNotepad.reg. Choose Yes when asked. And you are done.
Now if you right click on a file, you will see Open with Notepad context menu option.