Anyone who's installed Windows 7 any time in the last, oh, five years or so probably didn't enjoy the experience very much. Service Pack 1 for the operating system was released in 2011, meaning that a fresh install has five years of individual patches to download and install. Typically, this means multiple trips to Windows Update and multiple reboots in order to get the system fully up-to-date, and it is a process that is at best tedious, typically leading one to wonder why, at the very least, it cannot pull down all the updates at once and apply them with just a single reboot.
The answer to that particular question will, unfortunately, remain a mystery, but Microsoft did today announce a change that will greatly reduce the pain of this process. The company has published a "convenience rollup" for Windows 7 Service Pack 1 (and Windows Server 2008 R2), which in a single package contains all the updates, both security and non-security, released since the Service Pack, up through April 2016. Installing the rollup will perform five years of patching in one shot.
In other words, it performs a very similar role to what Windows 7 Service Pack 2 would have done, if only Windows 7 Service Pack 2 were to exist. It's not quite the same as a Service Pack—it still requires Service Pack 1 to be installed, and the system will still report that it is running Service Pack 1—but for most intents and purposes, that won't matter. Microsoft will also support injecting this rollup into Windows 7 Service Pack 1 system images and install media.