You can download it from the Microsoft Catalog website.

This update is not available through the Windows Update channel. However, it contains more than 170 updates that will be installed in a single process. As this update consists only of security updates and omitting all other updates, including IE11, it is not a real Service Pack 2. Microsoft named this update the Convenience Update. This update can be installed on a newly installed computer and update it with all major updates in a fraction of the time requested for regular update. In the April 2016 Microsoft eventually publish the super patch that contains all security updates published after Service Pack 1. Users around the world were waiting for years for the Service Pack 2. Let me introduce the unofficial Service Pack 2 (SP2). I will speak about the first method in another post.

We can either slipstream (integrate) all updates into the installation or we can install the Convenience Update.

It will be good if we can also significantly shorten the installation time. However, we will shorten the whole process down to the time need to download all those updates. We can speed up the whole process with an offline updating solutions. In most instances we need even two hours to completely update the computer. Installing those updates on a freshly installed computer will take more than an hour. After more than five years Microsoft published over 230 important updates. The last Service packs for the Windows 7 and Window Server 2008 R2 were published in 2011.

Download service pack1