Known Issue
Microsoft: September Windows updates break Always On VPN connections
Microsoft has notified IT administrators that users may experience Always On VPN connection issues after installing the September 2026 Windows 11 security updates. Always On VPN is a remote access solution that replaces the legacy DirectAccess technology and works with domain-joined, non-domain-joined, and Microsoft Entra ID–joined devices. It is available on Windows 10, Windows 11, […]
Microsoft fixes broken Excel copy and paste for all Office users
Microsoft has fixed a known issue that causes copy-and-paste failures for Excel users after installing the September 2026 security updates. The bug was confirmed following a wave of customer reports on Reddit and the Microsoft Q&A forums that this month’s updates (including the KB5002914 security update) break copy-and-paste, autofill, and formula dragging in Excel. “In […]
Microsoft: September updates break File History backup feature
Microsoft warned that the built-in File History backup feature in Windows may stop working on some systems after installing the September 2026 security updates. File History (introduced in Windows 8 and replaced by Windows Backup, which backs up data to OneDrive) automatically saves copies that let users recover accidentally deleted or damaged files using an older version […]
Microsoft fixes bug behind ‘Defender Antivirus is turned off’ alerts
Microsoft has resolved a known issue that causes incorrect alerts warning that Defender Antivirus was turned off after installing recent updates. In a Windows release health dashboard update on Thursday, Microsoft said the issue was fixed in the Microsoft Defender Antivirus update (version 4.18.26080.4) released on September 17. The company acknowledged the bug in late […]
Microsoft fixes broken copy and paste for Excel 2016 users
Microsoft has fixed a known issue that causes copy-and-paste failures for some Excel users after installing the September 2026 KB5002914 security update. This follows a wave of customer reports on the Microsoft Q&A forums and Reddit that KB5002914 breaks copy-and-paste, autofill, and formula dragging in Excel. “Although users try to paste content, the source remains […]
Microsoft shares workaround for Windows domain login issues
Microsoft shared a temporary fix on Wednesday for a known issue that prevents Windows 11 users from logging in with valid domain credentials after installing the September 2026 security updates. According to widespread reports from users and IT administrators on Microsoft’s Q&A forums, Reddit, and other online platforms, this bug breaks domain trust relationships on […]
Windows 11 KB5124008 update breaks domain trust for some users
Microsoft is investigating reports that the Windows 11 KB5124008 security update is breaking domain trust relationships on some enterprise systems, preventing users from logging in with valid domain credentials. Administrators report on Reddit and Microsoft’s Q&A forums that affected computers lose their secure channel with Active Directory after the Windows 11 update is installed and […]
Microsoft confirms KB5002914 Excel update breaks copy and paste
Microsoft has confirmed that copy and paste may silently fail for some Excel users after installing the September 2026 KB5002914 security update. This follows a wave of customer reports on Reddit and the Microsoft Q&A forums that the KB5002914 Office security update is breaking copy-and-paste, autofill, and formula dragging in Excel. The company has confirmed […]
Microsoft: September updates cause RDS failures on Windows Server
Microsoft has confirmed reports that the September 2026 security updates cause Remote Desktop Services (RDS) failures on Windows Server systems. According to a release health update on Friday, this known issue impacts Windows Server 2012 and later, as well as Windows 10 and Windows 11 devices. This confirmation follows widespread reports from Windows admins that […]
Microsoft: September updates break audio on some Windows PCs
Microsoft has confirmed that USB audio devices may fail on some Windows systems after installing the KB5124008 and KB5124012 September 2026 security updates. This known issue affects only devices running Windows 11, version 24H2 or later, and is limited to USB Audio Class 1.0 devices. “After installing the September 8, 2026, Windows security update [..], […]