KB5043076:Windows Installer Update: UAC Prompts for Credentials; Update Scripts Needed

September 10, 2024—KB5043076 (OS Builds 22621.4169 and 22631.4169)

Highlights
This update addresses security issues for your Windows operating system.

Improvements
This security update includes improvements that were a part of update KB5041587 (released August 27, 2024). 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.

• [Windows Installer] When it repairs an application, the User Account Control (UAC) does not prompt for your credentials. After you install this update, the UAC will prompt for them. Because of this, you must update your automation scripts. Application owners must add the Shield icon. It indicates that the process requires full administrator access. To turn off the UAC prompt, set the HKEY_LOCAL_MACHINE\\\\SOFTWARE\\\\Policies\\\\Microsoft\\\\Windows\\\\Installer\\\\DisableLUAInRepair registry value to 1. The changes in this update might affect automatic Windows Installer repairs; see Application Resiliency: Unlock the Hidden Features of Windows Installer.