Click Here to Install Silverlight*
United StatesChange|All Microsoft Sites
Microsoft
Protect Yourself from Piracy 
|Piracy Partner Home|Worldwide Piracy Sites
Know the facts. And get the genuine licensed software you deserve.
  1. Each PC needs its own full license. To be properly licensed and receive technical support and updates, you must have a full underlying license for all software installed on each PC.

  2. Volume License Agreements cover Windows software upgrades only. All Volume Licensing agreements, including those for Academic, Government, Healthcare, and Small Business are upgrade only and require a qualifying underlying license. Microsoft® Windows® upgrades are designed to upgrade previously acquired qualifying licenses. This means you must first have the full license for a qualifying underlying operating system for each PC before you install the upgrade. Windows software licensing is different from other Microsoft software because Volume Licensing Agreements do offer a full version of all Microsoft software except Windows desktop operating systems.

  3. There are two ways to legally acquire the initial full version of Windows: preinstalled on a PC through a PC manufacturer—this is the most cost-effective way to get a genuine Windows license on a new PC—or as full packaged retail product.

  4. Only qualifying operating systems can be upgraded using a Volume Licensing agreement. For more information on Windows operating systems versions that qualify for upgrades under Volume Licensing agreement programs, click here.

  5. If you discover you have unlicensed or non-genuine software Microsoft has a portfolio of legalization solutions available to help you. Click here to see what options are available to you.
Additional Resources
Genuine Microsoft Software | Microsoft Licensing | How To Tell | Microsoft Partner Network | Software Asset Management | Worldwide Piracy Sites

© 2009 Microsoft Corporation. All rights reserved. Contact Us |Terms of Use |Trademarks |Privacy Statement