There are no Microsoft shortcut commands that involves pressing the Ctrl, R and Windows keys simultaneously, as of May 2015. This means that pressing the keys will not trigger any command and thus will not accomplish anything. The closest keyboard shortcuts to the "Ctrl+R+Windows" are the "Ctrl+R" and the "Windows+R" commands.
Keyboard shortcuts are common features in personal computers that uses a sequence of pressing keys to trigger a command. In the Windows platform, keyboard shortcuts often use the Ctrl, Alt and Windows keys in combination with other keys. For example, pressing "Ctrl" and "R" triggers a command that refreshes the page currently displayed on the browser. Pressing "Windows+R," on the other hand, will open the "Run" dialog box.