Microsoft Support

Microsoft Home Page

Sign in

Select the product you need help with

Select a solution

Why can't I activate Windows? - Microsoft Windows Help
Learn more about why activation might not have worked, and find out what you can do to activate Windows.
Get help with activation errors - Microsoft Windows Help
See some of the most common activation errors and what you can do to try to fix them.
Why can't I activate Windows? - Microsoft Windows Help
Learn more about why activation might not have worked, and find out what you can do to activate Windows.
What is a product key?
Get a brief explanation about your product key and where to find it.
How to download Windows 8 - Microsoft Windows
Learn how to download Windows 8. Get the free Windows 8 Upgrade Assistant—it’ll tell you if your PC can run Windows 8 and walk you through each step.