[German]Cumulative update KB4490481released by Microsoft on April 2, 2019, for Windows 10 V1809 and Windows Server 2019 is causing BlueScreens on some systems.
Microsoft released the KB4490481 cumulative update on April 2, 2019 for Windows 10 V1809 and Windows Server 2019 after a long testing period with Windows Insiders. The update includes quality improvements and raises the Windows build to 17763.404. It should be noted that this update also still contains numerous bugs.
I had listed the fixes in the blog post Windows 10 V1809: Updates KB4490481 and KB4493510. This update also introduces new Group Policy for Windows 10 V1809 (see my blog post KB4490481 fixes/adds group policies in Windows 10 V1809). However, I also wrote in the linked posts that this update has a number of known issues. Therefore I cannot recommend an installation.
Update KB4490481 causes Blue Screens
And now there’s the blue screen problem. Blog reader EP pointed out this problem in this comment. Martin Brinkmann gave a clear warning on Twitter.
Don’t install KB4490481 for windows10 version 1809 without proper backup / system restore. Reports of System Service Exception loading errors after update installation emerge (maybe Intel related?). #windows10 #update #microsofthttps://t.co/wdJZD4Sz57
— ghacksnews (@ghacksnews) 4. April 2019
You should not install this update without a backup. Martin Brinkmann ran into a ‘System Service Exception’ error after the installation. Martin writes:
Ran into a System Service Exception error on restart after installing the update on one machine. System Restore fixed the issue, Startup repair did not.
Martin is not the only user who reports problems or BlueScreens in connection with this update. In a comment to his blog post there is a confirmation by another user and also the user EP mentioned above is plagued with a blue screen. Woody Leonhard has collected more findings at askwoody.com in this article.
Within tenforums user doctorwizz reported also a System Service Exception BlueScreen (0x0000003B) after installing this update.
I was rebooting from Win10 to boot to Win8.1. The update was installing on the shutdown phase and it was taking longer to install this time. So I tried to boot to Win10 again. It was continuing to update and bam. BSOD System Service Exception.
There is another confirmation within the tensforum thread, from a user receiving also a Blue Screen.
I like doctorwizz above also have BSOD on every machine I have after restarting to complete this update. They all run Win 10 Enterprise. I don’t have any special software running and I’ve never had such problems before. I got out of the fix by doing a system restore and I’m back at 17783.379 now. I tried an experiment or two. I tried the standalone windows catalog installer….same thing. I tried also the installer for kb4493510 and strangely it said it was already installed (but its not…well not that I can see). Its all very odd.
Woody Leonhard compiled the whole findings within this article on Computer World. He received another feedback on Twitter, where another user confirmed such a BSOD.
This is what I got. Did a system restore and things are working again. pic.twitter.com/QwP6zJeqlT
— Christian Vanderbrouk (@UrbanAchievr) 4. April 2019
A possible explanation
Within the known issues section of update KB4490481, Microsoft mentions a BlueScreen condition caused by this update:
- If you enable End-User-Defined Characters (EUDCs) per font, the system will stop working and a blue screen will be displayed at startup. In regions other than Asia, this is not a common setting.
- Microsoft writes about it: To avoid this problem, you should not enable EUDC per font. Alternatively, you can edit the registry to alleviate the problem. For more information, see KB4496149.
However, all of the above mentioned locations for the BlueScreen are not Asian systems – the EUDC font should therefore not be activated. Final question: Are any of you affected?
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