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

The most recent Windows security patches, identified as KB5063878 and KB5063875, were intended to strengthen the system against privilege escalation exploits, specifically CVE-2025-50173.

Microsoft says the August 2025 security updates are triggering unexpected User Account Control (UAC) prompts and app ...

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

User Account Control, or UAC, is a security mechanism built into Windows. Here's how to change its protection level and whether you should disable it.