Microsoft has released a one-time convenience roll-up for Windows 7 with Service Pack 1 (SP1) and Windows Server 2008 R2 with Service Pack 1 (SP1). This roll-up is cumulative back to SP1 and up to April of 2016. Since SP1, there have been well over 1,000 updates released in one form or another, including security updates, "hotfixes", and other Windows updates. Here is a link to the details:

http://download.microsoft.com/download/E/B/0/EB084E02-4173-444E-9438-53972AE2F9E0/3125574.csv

This roll-up is currently categorized by Microsoft as "optional". This means that there is no means by which this update will be automatically applied to any computer. This update is available in the Microsoft Update Catalog at the following location:

http://catalog.update.microsoft.com/v7/site/Search.aspx?q=3125574

Microsoft said is has released this roll-up in order to help its customers "catch up" with available updates, including hotfixes, many of which are not available through any other means except direct download from KB articles, one-by-one.

What is included in the Windows KB3125574 convenience rollup:

• Most of the servicing fixes that were released after the release of SP1 for Windows 7 and Windows Server 2008 R2.
• Most "hotfixes" released since SP1.
• Updates to "core" .NET components only (no updates to .NET versions that were not released with Windows 7 and/or Windows Server 2008 R2 SP1 at the time of SP1)
• Updates for Windows client, Windows server, and most components of each.

What is not included in the Windows KB3125574 convenience roll-up:

• "Platform updates" to Windows, such as KB2670838. KB2670838 was released through Windows Update and WSUS, so may already be installed. KB2670838 should be offered after the installation of this roll-up.
• Updates to Internet Explorer 11 (IE11), which was not included with Windows 7 SP1 and/or Windows Server 2008 R2 SP1.
• Updates to .NET versions not included with the original Windows 7/Server 2008 R2 installation.
• Updates that require additional actions on the end-user such as registry changes.

This roll-up consumes approximately 2 GB of disk space after installation. But during installation, the roll-up may use approximately 4 GB of disk space.

Both Windows 7 SP1 and Windows Server 2008 R2 SP1 operating systems are in "extended" support until January 14, 2020.