Microsoft fesses up to Windows update that caused UAC prompts
Microsoft has admitted that the security updates released for Windows in August caused problems for a lot of users. Affected users experienced a series of unexpected UAC (User Account Control) prompts.
The scale of the issue is large. This is not a problem that is limited to a particular version of Windows – every supported version of Windows that received the August 2025 security update is affected. This means that Windows 10, Windows 11, Windows Server 2022 and Windows Server 2025 have all been hit with the UAC prompts.