software bug Archives

Tech Optimizer

September 8, 2026

Microsoft Confirms False “Defender Antivirus Turned Off” Alerts Spreading Across Windows Devices

Microsoft has acknowledged a software bug causing persistent Windows Security pop-ups that incorrectly indicate antivirus protection is disabled. These notifications began appearing after the latest Microsoft Defender Antivirus updates, but the antivirus is functioning correctly. The issue affects various versions of Windows and Windows Server with the latest Defender updates. Microsoft has committed to resolving the issue in a future update, though no timeline has been provided. Users are advised to verify the status of their antivirus through the Windows Security app and disregard the notifications until a fix is released.

Tech Optimizer

September 4, 2026

Microsoft Confirms False “Defender Antivirus Turned Off” Alerts Spreading Across Windows Devices

Microsoft has acknowledged a software bug in its Windows operating system that causes misleading pop-up notifications, indicating that antivirus protection is disabled. These alerts began appearing after the latest Microsoft Defender Antivirus updates, despite the antivirus functioning correctly. The notifications can occur at startup and intermittently, and cannot be silenced through standard notification controls. The issue affects various versions of Windows and Windows Server with the latest Defender updates. Microsoft is working on a resolution, but no timeline has been provided. Users are advised to verify their antivirus status through the Windows Security app and can ignore the notifications if real-time protection is confirmed as active.

Winsage

March 14, 2026

A critical Windows 11 bug has locked some users out of the C: drive, Microsoft admits — here’s what you can do if you’re affected

Selected users of Windows 11, particularly those with Samsung laptops, are experiencing an issue that makes their main C: drive inaccessible, displaying the error message "C: is not accessible – Access denied." This problem has been acknowledged by Microsoft and appears to have arisen after the February 2026 security update (KB5077181). It primarily affects users of Windows 11 versions 24H2 and 25H2 in regions such as Brazil, Portugal, Korea, and India. Microsoft is investigating the issue, which may be linked to the Samsung Share app, and has provided a potential workaround to roll back to a previous version via the Settings > Windows Update menu. Users have also suggested changing the ownership of the C: drive as a workaround, though this comes with risks.