Get a new Windows product key

Applies to all editions of Windows Vista. Which edition of Windows Vista am I using?

If your Windows product key is not valid, if you don't have a Windows product key, or if you lost the product key that came with your copy of Windows, you'll need to buy a new one to activate Windows. You must activate Windows online or by phone within 30 days after installation to use every feature of Windows.

To get a product key, go to the Microsoft website.

See also

• Activating Windows: frequently asked questions