How to make an updated ISO with Windows 7 SP2 Convenience Rollup so Windows Update works

Although Microsoft released a convenience rollup for Windows 7 which is like Service Pack 2, that includes most of the post-SP1 security updates, non-security updates and hotfixes by request, they gave no instructions on how to make Windows Update work properly after the rollup has been integrated using DISM. Let's see what you need to do to create up-to-date ISO of Windows 7 with updates up to April 2016 so Windows Update works after you install it.

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