http://catalog.update.microsoft.com/v7/site/Search.aspx?q=3125574
If you are going to install this one update, and then you only need new updates released after April 2016.
And since this update can be injected into Windows 7 SP1 media, it’s fully supported to mount a Windows 7 SP1 image (WIM file), then inject this update into it.
See https://technet.microsoft.com/en-us/library/dd744559(v=ws.10).aspx for the details of how to do this.
To apply this update, you must install the April 2015 servicing stack update for Windows 7 (KB3020369).
Consider that monthly non-security updates for Windows 7 SP1 and Windows 8.1 (as well as Windows Server 2008 R2 SP1, Windows Server 2012 and Windows Server 2012 R2) will be available as a monthly rollup (fixes rolled up together into a single update).
Each month, we will release a single update containing all of the non-security fixes for that month.
Original Microsoft Article:
https://blogs.technet.microsoft.com/windowsitpro/2016/05/17/simplifying-updates-for-windows-7-and-8-1/
Update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 3161606
https://support.microsoft.com/en-us/kb/3161606
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