Microsoft points out a side effect of the August updates. User account control prompts appear when MSI repairs are started.

Mirosoft confirms after installing KB5063878 update and changing UAC is causing MSI Repair Prompts breaking app install on ...

Microsoft's solution was to enforce the User Account Control (UAC) prompt for administrator credentials ... such as when you are running MSI repair commands, launching Autodesk applications, or ...

Microsoft says the August 2025 security updates are triggering unexpected User Account Control (UAC) prompts and app installation issues for non-admin users across all supported Windows versions.