14 DAY TRIAL // KB4093112 is the April 2018 cumulative update for Windows 10 Fall Creators Update (version 1709), and unsurprisingly, it fails to install just like many of its predecessors.
Unfortunately, the more systems get this update, the more users confirm the failed installs, and as we’ve told you already, the typical behavior is experienced every time: KB4093112 downloads correctly and prompts the user to reboot the system only to then fail with various errors, undo changes, and return to the desktop.
The same cumulative update is then re-offered and Windows Update requires another system boot, only for KB4093112 to fail again and pretty much pushing the computer into an infinite loop.
Microsoft hasn’t said anything about how users can address these problems, and there’s a chance nothing will be shared until the next cumulative updates ship on the May 2018 Patch Tuesday.
Possible fix for KB4093112 bugs
In the meantime, the hundreds of users who took to the Microsoft Community forums to complain about issues with cumulative update KB4093112 came across a workaround that seems to fix problems on a number of systems. Before detailing this method, it’s worth knowing that the workaround is efficient only on a number of systems where KB4093112 fails to install. There are users whose computers hit other bugs after actually installing this cumulative update, but in this case, no workaround other than removing the patch completely is known to do the magic.
Also, this solution isn’t working for everybody, so while it fixes KB4093112 failed installs for some, it might not make any difference for others. Right now, it appears to be more of a matter of luck. We received confirmations that it could address errors like 0x80070bc2 when trying to install the cumulative update.
The first thing you should do is launch a command prompt window with administrator privileges. On Windows 10 Fall Creators Update, you can type Command Prompt in the Start menu, right-click the result, and then hit the option that reads Run as administrator. This means you should be logged in with an administrator account, as standard users are restricted from launching apps with full rights.
In the Command Prompt window, you need to enter the following commands one by one and press Enter after each of them (you should copy and paste them from the box below to make sure there’s no typo):
SC config wuauserv start= auto
SC config bits start= auto
SC config cryptsvc start= auto
SC config trustedinstaller start= auto
If this workaround doesn’t make any difference and KB4093112 still fails on your system, you could try downloading the cumulative update manually from the Microsoft Update Catalog. This link points to the download mirrors for each version of KB4093112, so check twice that you get the correct one for your system.
Additionally, in the case of systems that are already up-to-date and running the March 2018 cumulative updates, you can also download and try to install the delta updates for Windows 10, also available in the link above. Delta updates only include the changes that Microsoft developed since the previous patch, so they come as lighter packages.
Furthermore, since they include fewer changes, they’re less likely to fail to install, possibly helping users who are hitting issues with KB4093112 to bypass them.
The next Patch Tuesday takes place on May 8, but other cumulative updates are likely to be posted later this month with more improvements and fixes (but no security patches though). It remains to be seen if these updates will install correctly though.
