Note: the above key only applies to the right click menu of files.
For folders, go to this key: HKEY_CLASSES_ROOT\Folder Click the + sign next to Folder and expand it so that the Shell key is visible.
Right click the Shell key and choose New Key and name the key Notepad or whatever else you'd prefer (whatever the key is named is what will appear in the right-click menu).
Now right click the new key you made and create another key named Command.
Removing Items A lot of programs you install will add themselves to the right-click menu of your files and/or folders.
And most times, you have no choice in the matter and, as a result, your right-click menu can get very long with added items you don't even use.