Microsoft Releases an Emergency Update for Fall Creators Update – Brings More Issues Than Fixes


In another example of the patching system gone haywire since the chip bugs were disclosed in January, Microsoft has sent yet another update for Windows 10. However, this update isn't the usual stream of cumulative updates that arrive for all Windows 10 versions since today's update is only available for the latest Windows 10 Fall Creators Update.

The update only brings one fix but there are a number of known issues - something that doesn't often happen with cumulative updates. Here's what has been addressed with Windows 10 Fall Creators Update build 16299.251 (KB4090913):

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Addresses an issue in which some USB devices and onboard devices, such as a built-in laptop camera, keyboard, or mouse, stop working. This may occur when the Windows Update servicing stack incorrectly skips installing the newer version of some critical drivers in the cumulative update and uninstalls the currently active drivers during maintenance.

While the update only addresses the problem with USB and onboard devices, today's Windows 10 Fall Creators Update build 16299.251 brings a number of known issues making it quite a bug-filled update to go for instantly.

Windows 10 Fall Creators Update build 16299.251's known issues and their workarounds are mentioned below.

1- "Windows Update History reports that KB4054517 failed to install because of error 0x80070643"


Even though the update was successfully installed, Windows Update incorrectly reports that the update failed to install. Select Check for Updates to verify that there are no additional updates available.

You can also type About your PC in the search box on the taskbar to verify that your device is using the expected OS build.

Microsoft is working on a resolution and will provide an update in an upcoming release.

2- "Because of an issue that affects some versions of antivirus software, this fix applies only to computers on which the antivirus ISV updated the ALLOW REGKEY"


Contact your antivirus manufacturer to verify that their software is compatible and that they have set the following REGKEY on the computer:


Value Name="cadca5fe-87d3-4b96-b7fb-a231484277cc"



3- "After installing this update, some devices may fail to start, and return INACCESSIBLE_BOOT_DEVICE"

Microsoft said that this issue happens when the "windows update servicing stack incorrectly skips installing the newer version of some critical drivers in the cumulative update and uninstalls the currently active drivers during maintenance."

The workaround steps are available over here and a resolution will be provided in the next update.

4- "Because of an AD FS server issue that causes the WID AD FS database to become unusable after a restart, the AD FS service may fail to start"

The company said that there is no way to undo the database corruption. "To return your AD FS server to a functional state, you must restore it from a backup," it added.

While the update appears to be laden with bugs, it will be installed automatically for most of the Windows 10 users. If you have been dealing with the USB and other devices compatibility issues, you can head over to Settings > Update & security > Windows Update > Check for updates to install the latest build 16299.251 on your Windows 10 Fall Creators Update machine.