F2 - Rename a file (instead of right click, select Rename, then left click).
F5 - Refresh the screen - sometimes, the screen does not show the results of what you just did so try pressing F5. For the Internet, you may need to use CTRL F5 to get a refresh.
ALT+ENTER - View the properties for the selected item.
ALT+SPACEBAR - Open the shortcut menu for the active window.
Windows Logo+D - Display the desktop.