It is released on the third Tuesday of every month.Īs of December 2016, a Security-only Quality Update is not offered on a PC where a Monthly or Preview Rollup from the same month or later is already installed. Contains a preview of any new, non-security fixes that will be included in the next Monthly Rollup plus all security and non-security fixes from all previous Monthly Rollups.

Preview of Monthly Quality Update (also known as the Preview Rollup).

This update gets published to Windows Update as well as WSUS and the Windows Update Catalog. Contains all new security fixes for the month (that is, the same ones in the Security-only Quality Update) plus all security and non-security fixes from all previous Monthly Rollups.

Security Monthly Quality Update (also known as the Monthly Rollup).

NOTE This update does not contain fixes from previous months, and it is not available to administrators who do not use WSUS. It is released on Patch Tuesday, which is the second Tuesday of every month. Includes all new security fixes for the month and will only be published to Windows Server Update Services (WSUS) and the Windows Update Catalog. There are three core rollups released monthly: The goal is for these monthly rollups to become fully cumulative, which will happen as Microsoft adds previously released patches, so that users need only to install the latest single rollup. Each monthly rollup supersedes the previous month's rollup. A rollup is simply multiple patches combined into a single update. They have moved to a rollup model for Windows 7 SP1, Windows 8.1, Windows Server 2008 R2, Windows Server 2012, and Windows Server 2012 R2 updates.

Since October 2016, Microsoft has changed the way patches are released. Best practices for Patch Management Overview of Microsoft Patching

Server 2012 r2 update pack