Microsoft says Windows update may have caused login problems

Microsoft has made another admission that its updates for Windows may have caused problems for some people. The company says that updates released for Windows 11, version 24H2, Windows 11, version 25H2, and Windows Server 2025 in August and September could have resulted in login issues for some. There are two offending update – namely the August 29, 2025—KB5064081 (OS Build 26100.5074) Preview and September 9, 2025—KB5065426 (OS Build 26100.6584) – which Microsoft says could lead to Kerberos and New Technology LAN Manager (NTLM) authentication failures. The company explains that the problems will be noticed on devices that have duplicate… [Continue Reading]