To activate Windows 7 using an Internet connection:
Select the Start button Start button icon, right-click Computer, select Properties, and then select Activate Windows now.
If Windows detects an Internet connection, select Activate Windows online now.
Administrator permission required. You might be asked for an admin password or to confirm your choice.
Type your Windows 7 product key when prompted, select Next, and then follow the instructions.
To activate Windows 7 using the phone:
Select the Start button Start button icon, right-click Computer, select Properties, and then select Activate Windows now.
Choose Show me other ways to activate.
Type your Windows 7 product key, and then select Next.
Select Use the automated phone system. Administrator permission required
You may be asked for an admin password or to confirm your choice.
Select your location (or the location nearest 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.