Microsoft have released a Windows 7 convenience rollup that contains security updates from SP1 up to April 2016. This is nice because creating a reference image with all the patches is time consuming, because there is so many patches to be installed. In this guide I will show you how to patch the Windows 7 Sp1 wim file. This will make the reference image creating a lot faster.
1. Download the Windows 7 convenience Rollup here. Save it to C:\Update
2. Download the KB3020369 here.
3. Open a CMD in Admin mode