Failed to install updates KB4565351 and KB4566782

Last Tuesday, Microsoft launched Patch Tuesday for August, fixing 120 vulnerabilities in the system, two of them zero-day: one that allowed to validate false signatures and another that allowed remote code to be executed. However, despite fixing these and other major bugs, the patches KB4565351 and KB4566782 they are giving problems to some users.

Patch bugs KB4565351 and KB4566782 Windows 10

For starters, there are users with November 2019 Update and May 2020 Update they are failing to install these patches. The error that appears is 0x800f0988, 0x800f081f and 0x800f08a. The operating system warns that “there have been some problems installing the updates, but we will test it later. If you keep seeing this message and want to search for information, this may help you: (0x800f081f).

The fault of this 0x800f081f error has to do with the fact that some files are missing in the WinSXS folder that stores some copies of DLL files and other system files. When installing updates, some users claim that the computer restarts, shows a black screen, and finally does not install after restarting.

A possible solution is to go to the Microsoft Update Catalog and look for the patch that is giving us problems. There, we select the version according to our system, and we click Download. We will download an .msu file that we will have to execute. Later, we reboot, and it should already be installed.

Updates are causing blue screens

The worst of all is that some users are reporting that, after installing the KB4565351 patch, they are having two very specific problems: that the sound stops working on their computers, while others are having blue screens with the error SYSTEM THREAD UNHANDLED EXCEPTION. Therefore, it is best to pause updates until Microsoft releases patches that do not cause problems.

Yesterday, Microsoft also announced that it is going to show us pop-up windows with the news of each major update of the operating system, in addition to improving the controls of the graphics card to decide which one we leave as the default card for high-performance tasks.

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