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Microsoft Launches Windows 10 Cumulative Update KB4039396

Microsoft has just released a new Windows 10 cumulative update targeting only systems running the Anniversary Update (also known as version 1607).

Windows 10 cumulative update KB4039396 includes just two different fixes, and because it does not land on Patch Tuesday, no security improvements are shipped. What Microsoft wanted to do, however, is repair a bug introduced by a previous cumulative update and causing various problems on systems that installed it.

Microsoft explains in the release notes that this new cumulative update fixes Update History and hidden updates being lost on systems running Windows 10 Anniversary Update and where cumulative update KB4034658 was installed.
“Addressed issue where Update History and hidden updates are lost and a full scan for updates happens after installing OS Updates 14393.1532 through 14393.1613, including KB4034658. Installing this update will not restore past update history or hidden updates for users who have already installed the listed updates. However, this current update will address this issue for users who have not yet installed them,” the firm explains in the release notes.

No failed installs so far
A second bugfix reveals that Microsoft repaired a bug impacting the WSUS update metadata processing which could lead to error 0x8024401c on a number of client machines.

There are no known issues at this point and the cumulative update is supposed to install correctly on all systems, though we all know that this doesn’t happen every time. On the other hand, the number of problems experienced with cumulative updates has been reduced substantially following the release of the Creators Update, but there still are users out there complaining of failed installs.

Just like any cumulative update, a system reboot is required, and this means that you should save whatever you were doing before starting the install. At this point, we’re not aware of any failed installs, but we’ll update the article with more information should such reports reach the web in the next few days.