July 9, 2024—KB5040438 (OS Build 25398.1009) For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types. For an overview of Windows Server, version 23H2, see its update history page. Improvements This security update includes quality improvements. Below is a summary of the key issues that this update addresses when you install this KB. If there are new features, it lists them as well. The bold text within the brackets indicates the item or area of the change we are documenting. [Absent apps and features] Some apps and features are absent after you upgrade to Windows 11. [BCryptSignHash API (known issue)] Because of this issue, the API returns “STATUS_INVALID_PARAMETER.” This occurs when callers use NULL padding input parameters for RSA signatures. This issue is more likely to occur when Customer-Managed Key (CMK) are in use, like on an Azure Synapse dedicated SQL pool. [Input Method Editor (IME)] The candidate list fails to show or shows in the wrong position. [Windows Presentation Foundation (WPF)] A malformed Human Interface Device (HID) descriptor causes WPF to stop responding. [Handwriting panels and touch keyboards] They do not appear when you use the tablet pen. [HKLMSoftwareMicrosoftWindowsDWM ForceDisableModeChangeAnimation (REG_DWORD)] This is a new registry key. When you set its value to 1 (or a non-zero number), it turns off the display mode change animation. If the value is 0 or…Read More