Have you installed Windows 7 Os in this handset in your software? You need to activate it added with all the things. In addition, with activation you may also verify whether the installed version with your computer is genuine or not. To obtain all updates from Microsoft, this activation is also important. And if the OS is not updated regularly, it might be more vulnerable to virus attack. So, activation of Windows 7 is extremely important and it needs to be done within thirty days of installation.