Windows security Archives

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.

Tech Optimizer

September 21, 2026

Do You Really Need Antivirus in 2026?

The landscape of computer security has changed significantly over the past two decades. In 2026, antivirus protection remains important, but the need for separate third-party programs has decreased for many users due to the built-in Microsoft Defender in Windows 11, which is activated by default and effectively blocks 100% of common malware samples according to independent testing by AV-TEST. Windows 11 also includes additional protective features like SmartScreen and a robust Firewall. While dedicated security suites from companies like Norton and Bitdefender offer advanced functionalities, many users may find adequate protection with the built-in tools. Research from AV-Comparatives indicates that performance varies among security programs, particularly against real-world attacks. Phishing attacks accounted for approximately 60% of initial access points in incidents examined by the ENISA Threat Landscape report from 2025, highlighting that user behavior is a significant vulnerability. Modern web browsers and operating systems have enhanced their security measures, with Google Chrome, Microsoft Edge, macOS, and Android incorporating features to protect users from harmful websites and downloads. For the average Windows 11 user who keeps their system updated and practices safe browsing, built-in protection is generally sufficient, though paid antivirus options can provide additional tools.

Winsage

September 20, 2026

Microsoft Patches Windows Defender Bug That Kept Saying Your Antivirus Was Off

Microsoft resolved an issue in its Windows Security framework that incorrectly indicated Microsoft Defender Antivirus was disabled. This fix was implemented through Defender platform update 4.18.26080.4, released on September 17. The update installs automatically unless users have blocked mandatory security updates. Users had been receiving false alerts during system boot and intermittently afterward, which redirected them to the Windows Security home tab where settings appeared normal. Microsoft acknowledged the issue on August 28, affecting all supported versions of Windows and Windows Server with the latest Defender updates, but did not specify the triggering update. Users in the Windows Insider program reported similar warnings as early as June.

Tech Optimizer

September 19, 2026

Windows 11’s Defender kept falsely saying your antivirus was off, and Microsoft just fixed it

For nearly two months, Windows 11 users received persistent notifications from the Windows Security app falsely indicating that Microsoft Defender was disabled, despite it functioning properly. This issue, which began in early August, has been addressed with a security update from Microsoft. The false alerts affected all versions of Windows 11, Windows Server, and Windows 10, and were linked to a bug introduced with a recent Defender security update. Microsoft confirmed that no manual action is required from users to resolve the issue, as the fix will be automatically deployed to all PCs with mandatory security updates enabled. The problem was resolved in the Microsoft Defender Antivirus update (version 4.18.26080.4), released on September 17, 2026. Users can verify the status of Defender by checking Windows Security or using a PowerShell command.

Tech Optimizer

September 19, 2026

Set Up Bitdefender Antivirus Free: 13 Steps [2026]

Bitdefender Antivirus Free was upgraded to version 27.0.62.355 on September 11, 2026, introducing a new Advanced Threat Defense driver that enhances behavioral monitoring capabilities. The free version is designed for Windows only and promises to remain free indefinitely, lacking features found in paid versions such as anti-tracking tools and a full vulnerability scanner. The installation requires Windows 10 or 11, at least 2GB of free disk space, a local administrator account, an active internet connection, and a Bitdefender Central account. Users must remove any existing antivirus software before installation, and the installation process typically takes 60 to 75 minutes. Bitdefender Free covers one Windows device and offers robust malware detection capabilities, particularly with the Advanced Threat Defense layer. It is recommended to schedule regular scans and check the Notification Center for quarantined items. If uninstalled, the dedicated uninstall tool should be used to avoid leftovers that could interfere with future installations.

Winsage

September 19, 2026

Microsoft fixes bug behind ‘Defender Antivirus is turned off’ alerts

Microsoft resolved an issue that caused misleading alerts indicating that Defender Antivirus was disabled after recent updates. This fix was confirmed in an update to the Windows release health dashboard and was implemented in the Microsoft Defender Antivirus update (version 4.18.26080.4) rolled out on September 17. The bug, acknowledged by Microsoft in late August, affected users in the Release Preview Channel of the Windows Insider program since at least June and impacted all supported versions of Windows clients and servers. Users received erroneous notifications in the Windows Security app prompting them to activate Microsoft Defender Antivirus, despite it functioning correctly. Misleading alerts could appear upon Windows startup and intermittently thereafter, even when notification settings were disabled.

Winsage

September 16, 2026

Harden Windows Defender: 12 Steps, 99.9% [2026]

Windows 11 includes Microsoft Defender Antivirus, which operates in the background and receives automatic updates. Its default settings focus on compatibility rather than maximum security, prompting the need for configuration to enhance protection. Prerequisites for configuration include: - Windows 11 version 24H2 or 25H2 - Fully patched build number (26100.9457 or newer) - Local administrator account for certain steps - Microsoft Defender Antivirus version 4.18.x - Windows PowerShell 5.1 run as Administrator - Stable internet connection - No active third-party antivirus software Steps to enhance Microsoft Defender include: 1. Confirming the current Windows 11 build. 2. Verifying that Defender is the active antivirus using PowerShell. 3. Enabling cloud-delivered protection and automatic sample submission via PowerShell commands. 4. Activating Tamper Protection through Windows Security. 5. Enabling Controlled Folder Access to protect against ransomware. 6. Deploying Attack Surface Reduction rules in audit mode. 7. Turning on Smart App Control. 8. Enabling Core Isolation and Memory Integrity. 9. Scheduling weekly full and offline scans. 10. Creating narrow exclusions for known safe applications. 11. Enhancing network protection and SmartScreen features. 12. Running a PowerShell verification script to audit settings. These steps aim to optimize Microsoft Defender Antivirus for improved security comparable to premium solutions.

Tech Optimizer

September 15, 2026

Best Free Antivirus: 11 Steps, 18/18 Score [2026]

Microsoft Defender scored 17.5 out of 18 in the June 2026 evaluations by AV-Test, while Avast Free Antivirus and AVG AntiVirus Free both achieved a perfect score of 18 out of 18. Avira Internet Security scored 16.5. The evaluations assessed 16 consumer antivirus products based on protection, performance, and usability. Microsoft Defender is built into Windows 11 and is free, while Avast and AVG are true free offerings. AV-Test uses a scoring system where each category is scored out of 6.0, leading to a maximum total of 18.0. Users should ensure they have the latest versions of antivirus products and only run one real-time antivirus engine at a time. Common pitfalls include running two real-time engines and downloading from unofficial sources. For low-risk users, Microsoft Defender is sufficient, while those seeking higher protection may consider Avast or AVG.

Tech Optimizer

September 14, 2026

Top 10 Best Endpoint Encryption Software in 2026

The encryption landscape has shifted significantly, with Microsoft’s BitLocker and Apple’s FileVault becoming the primary free and integrated solutions for disk encryption. Organizations are encouraged to focus on comprehensive management capabilities rather than just acquiring encryption technology. Key management, compliance proof for auditors, and consistent policy enforcement across devices are critical. Native encryption solutions do not provide fleet-wide compliance, centralized key escrow, or advanced pre-boot authentication options. Various management models exist for different organizational needs, including options from Microsoft, Sophos, ESET, Trend Micro, Check Point, Trellix, WinMagic, Broadcom (Symantec), Dell, and Kaspersky. It is essential to ensure proper key management and recovery procedures before enforcing encryption to avoid data loss. Organizations should verify claims of compatibility and effectiveness of encryption solutions, especially regarding pre-boot authentication and cryptographic standards. Native encryption solutions are free, but management layers typically incur costs. Open-source solutions like VeraCrypt lack necessary management features, making them impractical for businesses.

Tech Optimizer

September 13, 2026

Top 10 Best Endpoint Encryption Software in 2026

The landscape of encryption engines has stabilized, with Microsoft BitLocker and Apple FileVault being the primary solutions. As of 2026, the emphasis is on management rather than just acquiring encryption technology. Key management elements include audit proofing, key escrow and recovery, policy enforcement, and pre-boot options. Native encryption solutions lack features such as fleet-wide compliance proof, centralized key escrow, consistent policy enforcement, advanced pre-boot authentication, and removable-media encryption. Various management models are available for different environments, including: 1. Microsoft BitLocker with Intune: Free for Windows Pro/Enterprise, integrates with Entra ID for key management. 2. Sophos: Manages both BitLocker and FileVault from a single console. 3. ESET: Offers lightweight management and removable-media protection. 4. Trend Micro: Integrates encryption with DLP capabilities. 5. Check Point: Provides advanced pre-boot options and policy management. 6. Trellix: Comprehensive enterprise encryption suite with a complex management interface. 7. WinMagic: Focuses on cross-platform encryption and strong pre-boot options. 8. Broadcom (Symantec): Manages native engines within its broader security framework. 9. Dell: OEM-integrated encryption management for Dell hardware. 10. Kaspersky: Provides encryption management but is restricted in the U.S. Key considerations before deploying encryption include ensuring key escrow is in place, conducting recovery tests, and being mindful of removable media and server encryption. Common mistakes include using outdated freeware and not verifying key escrow. Organizations should request auditor reports for compliance verification and confirm claims of compatibility and pre-boot functionality. Native encryption engines are free, while management layers typically charge on a per-endpoint basis.