If you already have Windows 7, Windows Anytime Upgrade enables you to upgrade to a more advanced version of Windows 7. If you're running an earlier version of Windows, you'll need to purchase a full version of Windows 7 Professional.
No disks, no delays--and no leaving the house. With Windows Anytime Upgrade, you can upgrade to a more advanced edition of Windows 7 in as little as 10 minutes. That way, you get to take advantage of extra features while keeping your current programs, files, and settings intact.
When you purchase Windows 7 Professional via Windows Anytime Upgrade, you get the Windows 7 Home Premium features you love and the business features your work demands.