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Microsoft has confirmed that a mouse personalization reset bug tied to the KB5120998 August 2026 preview update only affects non-English Windows 11 installations, after user reports flagged the issue on version 25H2 and 24H2 devices.
Microsoft has confirmed a known issue in which recent Microsoft Defender Antivirus updates trigger false "Microsoft Defender Antivirus is turned off" alerts in the Windows Security app, even though the antivirus is running normally. The bug affects all supported Windows client and server versions, including Windows 11 26H1 and Windows Server 2025, and a fix is still pending.
Microsoft confirmed a known issue (EX1254044) where classic Outlook crashes and restarts in Safe Mode on older Office builds running the newest Teams Meeting Add-in, and has since shipped a fix.
