When you have installed Windows 7 on your computer you must activate your copy with Microsoft. This activation process helps verify that Windows 7 on your system is genuine. You can activate Windows 7 right after you install the operating system, or you can activate within 30 days from the day of installation. If you do not activate your copy of Windows 7 operating system, you cannot use all of the features because it locks down.
Guide to activate Microsoft Windows 7.
• Click "Start." Right-click "Computer" and select the "Properties" option to bring up the System Properties window.
• Click "Activate Windows Now" to bring up the Windows 7 activation dialog.
• Click "Activate Windows Online Now."
If you are facing any problem while activating Windows 7 operating system you may take help from windows 7 support at their Toll Free No. +1-866-541-1792