KB5066835 and additional problems have emerged (October monthly update for Windows 11)
KB5066835 and additional problems have emerged (October monthly update for Windows 11)
The October monthly update for Windows 11, KB5066835, have several new issues. Here's the article from Windows Latest. https://www.windowslatest.com/2025/10/18...ll-errors/ Among the issues are again installation errors of the update. 0x800f0922 , 0x800f0983 , 0x800f081f , 0x80071a2d and 0x800f099. If you're getting this you can try to manually download the update from Microsoft Catalogue instead, or do an in-place upgrade. Some Logitech mice and keyboards with custom key mapping might not work, for example the mouse side buttons might not work on Logitect mice. Mouse and keyboard (not only from Logitech) might not work in Windows Recovery Enviroment. This one is quite serious, and the manual method described how to get it working again is quite tedious... The author wrote another article specific to this problem here, with instructions: https://www.windowslatest.com/2025/10/18...ery-input/ File explorer preview window bug, causing it to show a security warning of harmful file instead, on certain files. Localhost connection failures over HTTP 2. There's a workaround described to force HTTP 1.1 instead, or wait for a hotfix patch. Not mentioned still some unfixed bugs from previous monthly updates.... Edited October 18, 2025 by Mumintroll Included a second article with the WinRE issue
Looking forward to Steam OS with extensive app compatibility. The only thing they might monitor is your FPS, occasional lows, and graphics preferences.
Review the article, as it outlines the steps. You'll need the Windows 11 25H2 ISO file to proceed.
The author published a fresh article addressing that particular problem today. It also provides more thorough, step-by-step guidance (or plan for a patch). They note that removing the KB5066835 update will resolve the issue. You should hold off on reinstalling the update until the hotfix becomes available. https://www.windowslatest.com/2025/10/18...ery-input/ You’ll need an older Windows 11 ISO, prior to version 10.0.26100.5059.