Microsoft Confirms Recent Updates Cause Login Issues on Windows 11 24H2, 25H2, and Windows Server 2025

Microsoft has acknowledged a significant authentication problem affecting users of recent Windows versions, stemming from security enhancements in updates released since late August 2025. The company detailed how these updates are triggering Kerberos and NTLM failures on devices sharing identical Security Identifiers (SIDs), leading to widespread login disruptions across enterprise networks. This issue, now officially […]

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