Guide to activate Microsoft Windows 7 :
Once installed right-click Computer icon and select Properties.
Scroll to the bottom of page and click Activate Windows Now.
Click Activate Windows Online Now.
You will now need to enter your Windows 7 product key, copy any key and enter it as shown below, click Next to continue.
You must be connected to internet for activation to work, let the process finish.
Enjoy, you fully activated copy of Windows 7.
