A product key is a unique 25-character code used to activate Microsoft Windows Vista. It is typically found on a sticker attached to the computer or on the packaging that the computer came in. The product key is used to verify that the copy of Windows Vista being installed is genuine and has not been used on another computer. In order to check the product key for Windows Vista, follow these steps:
1. Click on the Start menu and select “Control Panel.”
2. Under “System and Security,” click on “System.”
3. In the “Windows Activation” section, click on the “Change product key” link.
4. Enter the 25-character product key in the field provided and click on the “Next” button.
5. Windows Vista will now be activated.