While it's true Windows 7 doesn't arrive on retail shelves and new PCs until October, Microsoft has announced two programs designed to give a head start to those who know they want the new operating system.

The Windows Upgrade Option, which runs through early next year, allows those buying a new Vista PC to get a free copy of Windows 7 after it hits shelves in October. The other program, which runs only through July 11, allows Windows XP and Vista users to pre-order a copy of Windows 7 Home...