Microsoft have released an update that contains all the security and non-security fixes released since the release of Windows 7 SP1 up through April 2016. Install this one update, and then you only need new updates released after April 2016. You can find it in the Microsoft Update Catalog To apply this update, you must install the April 2015 servicing stack update for Windows 7 (KB3020369). You can read more about the Convenience rollup update for Windows 7 SP1 here. Updated Please see this post instead!