To activate Windows 7 by phone:
Select the Start button, right-click
Computer, select Properties, and then select
Activate Windows now.
Choose Show me other ways to activate.
Enter your Windows 7 25-character product key, and then select
Next.
Select Use the automated phone system.
You may be asked for an admin password or to confirm your choice.
Select your location (or the location nearest to you) from the drop-down list, and then select
Next.
Call one of the available phone numbers listed. An automated system will guide you through the activation process.
If you're experiencing activation issues, see
Why can't I activate Windows and
Get help with Windows activation errors.
Carey Frisch