


This may be the C / D version of Windows 10 quality updates I mentioned above.

These updates have only non-security fixes, soĬritical Update is usually a worldwide release update for any specific issue that is not related to the security that the operating system offers, and I have not seen the cumulative release of this type of update.Ĭumulative Security updates are the Windows 10 quality updates I mentioned above. These are validated, production-quality optional releases, primarily for commercial customers and advanced users "seeking" updates. Release optional updates in the third and fourth weeks of the month. Optional version (C / D version) of Windows 10 quality updates.These updates are the primary and most important of all the monthly update eventsĪnd are the only regular releases that include new security fixes. Most of this update includes security fixes, so the type is usually "Security updates". This update will be released every month on "Patch Tuesday (the second Tuesday of each month)", and it's a cumulative update and includes all previously released fixes. Windows 10 quality updates (also called monthly quality updates or monthly cumulative updates).If you have feedback for TechNet Subscriber Support, contact some of my understanding: Please remember to mark as answers if they help. In your case, KB4541329 is already installed, then KB4540670 is not needed, the former replaces the latter, and the repair part of the latter is already included. Generally speaking, the C / D version does not add security fixes, so the B version containing securityįixes is treated as an important quality update. Therefore, the quality update released later always replaces the previous release, regardless of whether the update is the B version or the C / D version. This update is based on the new "Non-security Fix" + "History Cumulative Fix (here includes KB4540670 fix). This update is made up of a new "Security Fix" + "History Cumulative Fix". How to define the classification of quality update, my observation is to identify the fix content of "Newly added fixes", for example: Thanks for your reply, some explanation is needed here.Īs we discussed earlier, quality updates are composed of two parts:
