Windows 7 Upgrade Paths

There is much information on upgrading Windows Vista to Windows 7 on the Internet. 
 Note, Windows Vista editions are limited to what edition of Windows 7 they can directly upgraded: 
 . see also, 
 
 Windows 7 Upgrade Paths 	 Windows 7 Editions — Comparison Chart 	 Upgrading to Windows 7: what XP and Vista users need to know 	 Windows 7 Migration Time