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Microsoft is ending support for Internet Explorer mode in Edge
Winsage
September 26, 2026

Microsoft is ending support for Internet Explorer mode in Edge

Microsoft has announced that the Internet Explorer mode within its Edge browser will be supported until at least the end of 2029. This mode allows organizations to run IE's rendering engine on current Windows versions. Microsoft will provide a minimum of one year's notice before any end-of-support date. IE mode is a compatibility feature in Edge that uses the legacy Trident engine. Internet Explorer officially retired its standalone browser in June 2022, having dropped to less than 1 percent of the browser market share at that time.
silver Android smartphone
Tech Optimizer
September 23, 2026

BigDiskBuster PoC Blocks Windows Defender Updates

A new tool named BigDiskBuster has been released on GitHub, which disrupts Microsoft Defender Antivirus by preventing it from installing updates. It does this by consuming available disk space during the update process, causing Defender to remain on its current version and unable to receive new platform or signature updates. BigDiskBuster operates as a local denial-of-service technique and requires prior access to the target machine to execute. The tool was created by researcher Abdelhamid Naceri, known as Nightmare Eclipse, who has previously worked on similar projects. As of now, there is no CVE identifier, patch, or advisory from Microsoft regarding this issue.
New Windows Defender zero-day blocks Microsoft antivirus updates
Winsage
September 23, 2026

New Windows Defender zero-day blocks Microsoft antivirus updates

Security researcher Abdelhamid Naceri, known as Nightmare Eclipse, released a zero-day exploit called BigDiskBuster that targets Microsoft Defender, preventing antivirus updates and leaving systems vulnerable. BigDiskBuster operates across all supported Windows versions and must run in the background to block updates. Naceri has previously released a similar exploit called UnDefend and has a history of releasing multiple zero-day exploits since April 2026 amid a dispute with Microsoft. Two weeks before BigDiskBuster, he introduced another exploit named ShieldCrash, which grants SYSTEM access and circumvents a patched flaw. Naceri's recent exploits include tools like LegacyHive, BlueHammer, RedSun, YellowKey, GreenPlasma, and MiniPlasma, all targeting Microsoft Defender and other Windows components. Microsoft has warned of potential legal action against malicious activities but has not commented on BigDiskBuster.
What Windows 11 KB5129195 fixes
Winsage
September 17, 2026

What Windows 11 KB5129195 fixes

On September 14, 2026, Microsoft released KB5129195, an out-of-band cumulative update for Windows 11 versions 24H2 and 25H2, transitioning systems to build 26100.9457 for 24H2 and 26200.9457 for 25H2. The update addresses several regressions, including failed connections and sign-ins in Remote Desktop Services, host-folder sharing failures in Plan9 file sharing for HCS-managed Linux virtual machines, and failures affecting 8-channel and 3D-audio modes in USB Audio Class 1.0. However, it does not fix ongoing issues with AMD Radeon graphics cards, such as freezes, black screens, and driver timeouts, which have affected various hardware configurations. KB5129195 is available through multiple distribution channels, including Windows Update and WSUS.
Best Antivirus for Windows 2026: 5 to Install, 1 to Avoid
Tech Optimizer
September 16, 2026

Best Antivirus for Windows 2026: 5 to Install, 1 to Avoid

Windows is the only desktop platform where antivirus software is essential. Microsoft has patched many vulnerabilities, but the OS still allows installations from unverified sources and connects to potentially untrustworthy networks. As of 2026, the top antivirus solutions for Windows include: - Norton 360: Best overall, with a full scan time of 13 minutes and 22 seconds, robust firewall, and up to 250 GB cloud backup. - Bitdefender: Best for older PCs, maintaining peak CPU usage at 11% and memory at 183 MB during scans. - Avast One: Best free option for Windows 11, achieving a perfect score in AV-TEST. - NordVPN Threat Protection Pro: Best for VPN users, blocking 90% of malware. - McAfee+: Best for households with multiple devices, offering unlimited coverage but is the slowest scanner. - Microsoft Defender: Best free option included with Windows, awarded Top Product by AV-TEST. Norton 360 has a 99.8% detection rate and offers a 60-day refund window. Bitdefender also has a 99.8% detection rate with low resource usage. Avast's free version is effective, while NordVPN provides integrated malware protection for existing VPN users. McAfee is suitable for large households but has slower performance. Microsoft Defender is adequate for single users practicing safe browsing but lacks multi-device support. Kaspersky is unavailable in the U.S. due to supply chain concerns.
30 Days Until Windows 11 24H2 Support Ends; Excel Paste Glitch Surfaces Simultaneously
Winsage
September 15, 2026

30 Days Until Windows 11 24H2 Support Ends; Excel Paste Glitch Surfaces Simultaneously

Microsoft announced on September 14 that the Windows 11 24H2 edition, including Home and Pro versions, has only 30 days of support remaining, with a deadline for updates set for October 13, 2026. Users are encouraged to upgrade to version 25H2 or later to continue receiving security updates. The Enterprise and Education editions will have support until October 12, 2027. Users have reported issues from September's security updates, particularly with the Office patch KB5002914, which disrupts the copy-and-paste function in Excel across multiple versions. Microsoft has acknowledged the issue but has not yet released a fix. A temporary workaround involves manually removing the problematic patch, though this also removes the associated security fixes. Additionally, users have experienced connection drops and unresponsiveness in Remote Desktop Services (RDS) across various Windows versions, including Windows 11 26H1 and Windows Server 2012. Microsoft confirmed that related tools may also stop responding, and restarting virtual machines may temporarily restore functionality. USB audio issues have been reported on certain USB Audio Class 1.0 devices across Windows 11 versions, with users experiencing loss of audio output and corrupted sound settings. Switching to 2-channel mode has helped some users, but Microsoft has not provided a timeline for a comprehensive fix. As Windows Server 2012 nears the end of its Extended Security Updates period on October 13, 2026, the RDS issues add pressure on administrators. Users on 24H2 need to prioritize migration to 25H2, while those with the latest updates should be cautious regarding Excel and Remote Desktop functionalities.
Microsoft patches Windows and Excel – breaks audio, remote access, and paste
Winsage
September 14, 2026

Microsoft patches Windows and Excel – breaks audio, remote access, and paste

Microsoft's recent security updates have caused disruptions in several areas: 1. Remote Desktop Services (RDS): Users on Windows 11 26H1 and Windows Server 2012 are experiencing connectivity issues, including failed connections, freezing servers, and unresponsive tools like Microsoft Management Console (MMC). A temporary solution involves restarting the virtual machine, and Microsoft is working on a fix. 2. USB Audio Devices: Problems have been reported with USB Audio Class 1.0 devices on Windows 11 26H1, 25H2, and 24H2, leading to audio issues. A workaround includes switching to two-channel mode, and Microsoft is addressing the situation. 3. Excel Functionality: A fix for vulnerabilities in Excel has disrupted the paste operation across versions 2016, 2019, 2021, and 2024, leaving users unable to paste content correctly. Some users have resolved the issue by uninstalling and reinstalling Office or using commands to remove the security update, though this also removes the associated security fixes.
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