Windows Bug Information– Category –
This category compiles information on issues that occur after applying Windows updates or patches. It explains known issues found in monthly updates (B releases) and preview updates (C releases), official Microsoft announcements, and user reports. Please use this information to determine whether it is safe to apply the latest updates.
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[Windows 11] Bug and cause of the menu becoming transparent when right-clicking on a desktop image
A bug has been discovered in Windows 11 environments where right-clicking an image file on the desktop causes the context menu to become transparent and not render correctly. This issue... -
Error "0x80073712" occurs with Windows 11 preview update "KB5079391".
A known issue causing installation errors has been added to the Windows 11 preview update "KB5079391," released on March 26, 2026. Currently, ... -
[Win11] How to fix the infinite loop update crash with error 0x800f0806! Force cancel pending operations
Every time I shut down or restart Windows 11, an update installation starts, but it always crashes and goes back to the original state... Furthermore, I can't use the DISM command to install components... -
[Win11] Bluetooth disappears after Windows Update and how to fix it
After applying Windows Update in Windows 11, it has been confirmed that Bluetooth suddenly stops working or the Bluetooth item disappears from the settings screen. -
[Temporary Workaround] How to fix the "flash bang" issue in Windows 11 Dark Mode (white flashing when creating a new tab)
Windows 11 dark mode enthusiasts have been plagued by a "flash bang" issue in which Explorer flashes briefly. Microsoft has fixed this issue in the December 2025 cumulative update... -
How to fix the issue where "QTTabBar" disappears after applying Windows Update
In Windows 11, after applying a Windows Update from December 1, 2025 (such as KB5070311, KB5074109, or KB5074105), the Explorer tab extension software "QTTabBar" may not work properly. -
[Bug] Cause and solution for the issue where text is displayed vertically (horizontally) after applying KB5070311 [Windows 11 24H2/25H2]
After installing the preview update KB5070311 for Windows 11 (24H2/25H2) released on December 1, 2025, some software may display strange characters... -
[Bug] The "Password" icon disappears on the Windows 11 lock screen and how to work around it
Microsoft has announced a known issue with the lock screen sign-in options in Windows 11 versions 24H2 and 25H2. As of August 2025... -
[Solved] The touch keyboard pops up automatically in the Epic Games Launcher, making it impossible to type! A simple fix for the issue of characters being repeatedly typed
Recently (since around October 2025), when trying to log in (sign in) to the Epic Games Launcher, the touch keyboard appears, preventing you from typing properly. -
[Solved] Why Windows Defender Firewall stops with "The parameter is incorrect (ID 7024)" and how to fix it
Are you experiencing issues with the Windows Defender Firewall service stopping automatically in Windows 11 or Windows Server 2022? Check the Event Viewer... -
KB5068861 fixes Task Manager bug! But beware of changes to "LSA Protection" specifications (new bug?)
On November 11, 2025, the November monthly security update "KB5068861" was released for Windows 11 24H2/25H2. This update has been widely reported by many users (including the author). -
Win11 KB5067036 bug: "Processes remain even after closing Task Manager"
The official release notes for the optional preview update "KB5067036" released on October 28, 202510 for Windows 11 version 24H2/25H2 state, "Task Manager...