How to Change or Re-Enter Product Key to Activate Windows 7 and Vista

Windows 7 and Vista has built a new graphical user interface to change or re-enter product key no. Product key is also known as serial no or CD key no. It is possible to change your previously entered product key no using this simple GUI method. Entering your serial no is mandatory in order to activate Windows 7 or Vista copy. If you are facing activation problems, you can use the keys and activate it again without more any hassles.

Activate Windows 7 or Vista by changing or re-entering product key

1. Click on Start button
2. Right click on Computer icon >> Select System Properties from the options
3. Click on Change product key from Windows activation section



4. In the product key box, enter your product key no and click on Next



5. Windows will activate your Windows 7 copy online
6. You are done.

While going through above steps, Windows might ask you to enter your admin (local computer) ID and password. Enter them each time to continue. Windows might also show you an activation wizard, simply navigate through it and activate your installation.