In addition, new features, like Search highlights, may initially be deployed in the prior month's optional non-security preview release, then ship broadly in the following month's security release. Available the fourth week of the month, these production-quality updates are released ahead of the planned security update release for the following month. You've got options with optional non-security preview releases. Monthly security updates are mandatory and are available through our standard channels, which include Windows Update, Windows Update for Business, Microsoft Intune, Microsoft Configuration Manager, Windows Server Update Services (WSUS), and the Microsoft Update Catalog. Note: People tend to use 'B release,' quality update, security update, and LCU interchangeably. These updates help keep Windows devices secure and compliant by deploying stability fixes and addressing security vulnerabilities. That is, they include both new and previously released security fixes along with non-security content introduced in the prior month's optional non-security preview release (see below). Published on the second Tuesday of each month, our security update releases are cumulative.

Monthly security update releaseįor many of you, Update Tuesday (also referred to as 'Patch Tuesday') is a regular part of Windows servicing for client and server. This post summarizes the different types of monthly updates and shares insights on how we've optimized our approach to Windows servicing and delivery. This contributes to the reliability and quality of the Windows platform. Monthly updates are cumulative and include all previously released fixes to guard against fragmentation of the operating system (OS).

Whether you're an IT administrator or a general user, Windows monthly updates provide you with the security fixes to help keep your devices protected-as well as enhancements based on your feedback. Windows updates keep you protected and productive in different ways, and we continue to optimize the update experience.

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