The instructions you used are a bit out of date, those were for Vista (released in 2006), not Windows 8.1 (released 2013).
To get an instant shortcut to start the Sound Recorder, do this:
- Go to your Start screen
- Type recorder and see the search results appear.
- Right-click the microphone icon for sound recorder, and click "Pin to Taskbar".
The new icon on your taskbar can be moved where you want it, and clicked anytime to start the sound recorder (or switch to it if you've already started it).