Windows security Archives

Winsage

October 11, 2026

Windows PCs that are not up to date will lose Windows Update itself in 2027

Windows machines that are not current with updates will face changes in access to Windows Update due to two critical certificate expirations on May 17, 2027, and June 19, 2027. Supported versions must install specific security updates before these dates to maintain access. - Windows 11, version 25H2 and later: No action required. - Windows 11, version 24H2 and Windows Server 2025: Must install the September 2025 Windows security update or later, before June 19, 2027. - Other in-support Windows 11 versions and Windows Server 2022: Must install the July 2026 Windows security update or later, before June 19, 2027. - In-support Windows 10 versions: Must install the July 2026 Windows security update or later, before June 19, 2027. - Windows 10 Enterprise 2019 LTSC, Windows Server 2019, and Windows Server 2016: Must install the July 2026 Windows security update or later, before May 17, 2027. - Any other Windows version: Upgrade to a supported release to maintain access. Devices that are up to date will continue receiving updates without interruption, while those that are behind will lose access to Windows Update services after the expiration dates. Out-of-support versions will lose access entirely. The notice regarding the certificate expiration was posted on October 8, 2026, and reiterated on October 10, 2026.

Tech Optimizer

October 10, 2026

Best antivirus for Windows PC in 2026: 7 apps to keep your PC safe

Robust antivirus software is essential due to the rise of sophisticated online threats, including AI-driven attacks. Various antivirus solutions for Windows include: - Norton: Comprehensive protection with a user-friendly interface. - Avast: Easy to use, ideal for straightforward experiences. - AVG: Budget-friendly without compromising essential features. - Avira Prime: Simple and effective for beginners. - McAfee: Focuses on privacy and safeguarding personal information. - Panda: Offers a wide range of features for comprehensive security. - Windows Security: A free option providing basic protection. Key features to consider in antivirus software include strong protection against malware, user-friendly interfaces, performance impact on systems, and additional tools like parental controls and VPNs. Norton 360 Deluxe includes parental controls and cloud storage, while Avast One is noted for its simplicity. AVG Internet Security is cost-effective, and Avira Prime offers beginner-friendly features. McAfee Total Protection emphasizes privacy but may be pricier.

Tech Optimizer

October 10, 2026

30-year Microsoft veteran explains why you shouldn’t run two antivirus apps on Windows 11

Raymond Chen, a Microsoft veteran, advises against installing multiple antivirus solutions on the same system due to conflicts that arise, such as each program attempting to quarantine the other's processes. This can lead to significant performance issues and erratic behavior in Windows. Microsoft has stated that Windows Defender is sufficient for most users, highlighting its comprehensive security features in Windows 11. The company warns that running multiple real-time antivirus programs can increase resource consumption and conflict likelihood. Independent testing has shown that Microsoft Defender ranks highly among antivirus solutions.

Winsage

October 8, 2026

Copilot Gets Control of Windows and Your Files as Microsoft’s Recall Bill Comes Due

Microsoft is inviting Windows users to grant its Copilot feature access to their files and activities, with user consent. The new iteration of Copilot can understand content on the device, perform tasks like organizing files, troubleshooting, and writing code, with some tasks processed in the cloud. Activation is opt-in, folder access is limited, and Copilot operates under separate accounts from users. Microsoft has implemented safeguards, including Microsoft Execution Containers to define agent access. However, internal warnings from Microsoft's security team highlight potential risks associated with agents capable of modifying environments. Features for enhancing auditability of agent activities are under development. Microsoft previously faced criticism for its Recall feature, which raised security concerns. The opt-in design places accountability on Microsoft, as users must grant access. The hybrid features require a Copilot+ PC and are set to roll out in the coming months, with taskbar search actions already reaching Windows Insiders. Over 40 percent of newly manufactured business laptops are Copilot+ PCs, with the Surface Laptop Ultra launching on October 16.

Tech Optimizer

October 7, 2026

Antivirus: Do you still need it?

Purchasing antivirus software is often seen as necessary but can be frustrating, especially with built-in security features available on most computers. Windows includes Microsoft Defender Antivirus, which has been independently tested and scored well for protection, performance, and usability. Mac users have XProtect for malware detection. Users should verify that their existing protection is enabled and up-to-date before considering a subscription. Antivirus programs combat various types of malware, using methods like signature scanning and heuristic analysis, but they are not infallible. Research on antivirus effectiveness varies, with scores reflecting different criteria and not universally applicable detection rates. Subscriptions may be worthwhile if they offer specific features, but users should be cautious about renewal prices and unnecessary multiple installations. Maintaining updated software and practicing good security habits are essential for protection. For everyday use, built-in protection is often sufficient unless additional benefits justify the cost of extra software.

Winsage

September 27, 2026

Windows 11’s driver signature requirement is one of the best anti-consumer security features out there

Windows 11 requires drivers to be digitally signed, a policy aimed at enhancing security by preventing unauthorized code from executing at the kernel level. This requirement, which began with Windows Vista and became mandatory with Windows 10, version 1607, has tightened over the years, especially with the introduction of UEFI Secure Boot and TPM in Windows 11. While this enforcement protects against malware and supports anti-cheat systems in gaming, it limits user autonomy and imposes significant challenges for developers, particularly those working on smaller projects. In contrast, Linux allows users more freedom to modify their systems, though this flexibility can compromise security.

Tech Optimizer

September 25, 2026

We Tested 10 Best Antivirus Software for 2026

Cybersecurity threats are on the rise, with Verizon’s 2026 Data Breach Investigations Report indicating that 48% of breaches involve ransomware and 31% arise from software vulnerabilities. A review of leading antivirus programs assessed their effectiveness against various threats. Top antivirus software includes: - Bitdefender: Best overall, effective against various threats, perfect score from AV-TEST. - Norton 360: Best all-in-one suite, includes VPN and parental controls, perfect score from AV-TEST. - McAfee+ Premium: Best for families, unlimited device coverage, full marks from AV-TEST. - Malwarebytes: Best for simple protection, user-friendly interface, rated 5.5/6 by AV-TEST. - ESET NOD32: Best for advanced users, lightweight and fast, includes Gamer Mode. - Avast: Best free option, offers various scanning options, straightforward upgrade path. - Microsoft Defender: Built-in for Windows, essential protection, perfect score from AV-TEST. - Intego ONE: Best for Mac users, includes firewall and VPN. - Surfshark Antivirus: Combines antivirus and VPN services, real-time protection. - TotalAV: Best for beginners, combines antivirus with web security tools. The evaluation process included lab data from AV-TEST and AV-Comparatives, hands-on experience, and criteria such as malware protection, false positives, system performance impact, phishing protection, ease of use, platform coverage, additional security features, and pricing. Key metrics from antivirus lab tests include protection scores, false positives, and performance impact. The choice between antivirus software and internet security suites depends on individual needs. Antivirus software remains necessary, especially for Windows PCs, to complement other security measures.

Winsage

September 24, 2026

Decades-old file security flaws found in Android, Linux, macOS, and Windows

Security researchers from Graz University of Technology in Austria have discovered significant vulnerabilities in the file notification systems of major operating systems: Android, Linux, macOS, and Windows. These flaws have existed for decades and can lead to the leakage of sensitive system information. The affected systems include inotify on Linux (since 2005), FileObserver on Android (since 2008), ReadDirectoryChangesW on Windows (since 2000), and FSEvents on macOS (since 2007). The vulnerabilities allow unprivileged users to monitor file events without explicit read permissions, enabling potential attacks such as inter-keystroke timing attacks and website fingerprinting. For example, on Linux, monitoring a readable directory can leak events on files that cannot be read, allowing attackers to achieve a 93.1% to 100% accuracy rate in monitoring keystrokes. Specific vulnerabilities include CVE-2025-68788 on Linux, which received a partial fix in December 2025, and issues on Android where FileObserver can bypass app storage isolation. On macOS, limited information is available due to a lack of bypasses for private directories, while on Windows, monitoring the root directory can reveal the full path of every accessed file, allowing real-time tracking of web activity with a 97.8% accuracy rate. Microsoft has described the issue as "by-design," which has faced criticism. The researchers propose stronger mitigations, such as disallowing monitoring of entire drives on Windows and introducing a permission system for file monitoring on Windows and macOS. Their findings will be presented at the ACM CCS 2026 conference in November in The Hague, Netherlands.

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.

Winsage

September 21, 2026

Microsoft: September updates break File History backup feature

Microsoft has issued a caution regarding the File History backup feature in Windows, indicating potential functionality issues on certain systems after installing the September 2026 security updates. Users may experience application crashes related to FileHistory.exe and KERNELBASE.dll, and may be unable to create or update backups. Misleading messages such as “Reconnect your drive” may appear, and the “Last Backup” timestamp may fail to update. Affected Windows versions include Windows 10 21H2 or later, Windows 10 Enterprise LTSC 2016/2019, and Windows 11 23H2 and later. Microsoft has acknowledged ongoing issues related to the September 2026 updates and is working on solutions.