Microsoft Defender Antivirus Archives

Tech Optimizer

May 4, 2025

5 reasons why I stopped using an antivirus on Windows 11

A growing number of users are reevaluating their reliance on traditional antivirus software, reflecting a deeper understanding of personal security needs. Many individuals are adopting strong cyber hygiene practices, taking personal responsibility for safe browsing and cautious online behavior. Modern browsers like Opera and Brave offer built-in security features and VPNs, emphasizing self-discipline in cybersecurity. Microsoft Defender Antivirus, integrated into Windows 11, provides real-time protection and frequent updates, making it a reliable choice for users who practice basic cyber hygiene. High-end antivirus packages often come with subscription fees, while open-source solutions can be cost-effective alternatives. Users have reported improved system performance after moving away from third-party antivirus programs, experiencing faster boot times and increased responsiveness. Essential security features are now recognized as not exclusive to antivirus software, with regular data backups, encryption, and password management enhancing overall protection. While some users find sufficient protection without traditional antivirus software, others with different threat models may still require it.

Winsage

May 2, 2025

Get Windows 11 Home for A$23 Right Now

Users can upgrade from Windows 10 to Windows 11 Home for a reduced price of A until June 1, down from the regular price of A7. Windows 11 features a refreshed interface with rounded app corners, a centered taskbar, customized widgets, and enhanced multitasking tools. It offers performance improvements, quicker startup times, and enhanced security features. A verified buyer reported a seamless installation process. The upgrade opportunity is available until June 1 at 11:59 p.m. PT, with prices subject to change.

Tech Optimizer

April 30, 2025

5 Free Antivirus Programs To Eliminate Malware and Viruses (2025)

Users are increasingly seeking effective malware protection without the cost of premium software, leading to the emergence of free antivirus programs that offer robust security features. This trend is particularly beneficial for Windows 11 users who want real-time protection while staying within budget. Several leading cybersecurity firms provide free antivirus solutions equipped with advanced features such as real-time scanning, phishing defenses, cloud-based malware detection, and system optimization tools. These free programs can adequately protect a diverse audience, including gamers, remote workers, students, and casual users. Top free antivirus programs for Windows 11 in 2025 include: 1. Bitdefender Antivirus Free: Utilizes the same malware engine as its paid version, offers real-time detection, anti-phishing protection, and is ultra-light on system resources. 2. Microsoft Defender Antivirus: Integrated into Windows 11, provides cloud-delivered protection and built-in ransomware mitigation without ads. 3. Avast Free Antivirus: Offers additional tools like network scanning and a Do Not Disturb mode for gaming. 4. AVG AntiVirus Free: Features a simpler interface, link and attachment protection, and fewer pop-ups. 5. TotalAV Free Antivirus: A newer option with a clean interface, real-time protection, and a junk file cleaner. Key factors to consider when selecting free antivirus software include real-time protection, low resource usage, minimal intrusion, and extra security tools. While free solutions are suitable for most users, premium protection may be necessary for small businesses or those handling sensitive data. For gamers, Bitdefender and Avast are recommended for their low system impact and gaming modes. For remote workers, Microsoft Defender and TotalAV are highlighted for their ease of use and integrated protections. Essential features of effective antivirus programs include robust virus protection, real-time scanning, and a behavior shield to detect new threats. Performance should not significantly slow down the system, and the interface should be user-friendly. Experts recommend Windows Defender for basic protection, with AVG and Avast receiving endorsements for their feature balance, while Bitdefender Free is noted for its detection rates and minimal system impact. Free antivirus programs may lack advanced features and technical support compared to paid versions.

Tech Optimizer

April 15, 2025

Steps to Scan Your Computer for Free and Check for Viruses and Malware

Windows Security, previously known as Windows Defender, is a built-in security tool in Windows 10 and 11 that provides comprehensive protection against viruses and malware without requiring additional software. Users can perform manual scans, including Quick, Full, and Custom scans, to identify and eliminate threats. To run a scan, users must open Windows Security, navigate to "Virus & threat protection," and select the desired scan option. Windows Security also includes features such as real-time protection, firewall and network protection, app and browser control, device security, and account protection. It is essential to keep Windows Security updated with the latest virus definitions for optimal protection. Users can also schedule automatic scans for regular checks.

Winsage

April 9, 2025

Exploitation of CLFS zero-day leads to ransomware activity

The Microsoft Threat Intelligence Center (MSTIC) and Microsoft Security Response Center (MSRC) identified a zero-day elevation of privilege vulnerability in the Windows Common Log File System (CLFS), designated as CVE-2025-29824. This vulnerability has been exploited by the PipeMagic malware, attributed to the group Storm-2460, affecting organizations in various sectors across the U.S., Venezuela, Spain, and Saudi Arabia. Microsoft released security updates on April 8, 2025, to address this vulnerability. The exploit allows attackers with standard user privileges to escalate their access, and it was executed from a dllhost.exe process. The exploit utilizes memory corruption techniques and the RtlSetAllBits API to gain all privileges and inject processes into SYSTEM processes. Post-exploitation, the attackers injected a payload into winlogon.exe, leading to ransomware activity characterized by file encryption and the creation of ransom notes. Indicators of compromise include the creation of a CLFS BLF file at C:ProgramDataSkyPDFPDUDrv.blf, command lines associated with ransomware activities, and specific domains linked to PipeMagic. Microsoft advises applying security updates promptly and recommends strategies for mitigating ransomware threats, including enabling cloud-delivered protection and utilizing device discovery.

Winsage

March 10, 2025

How to Improve Game Data Loading Times in Windows

Most modern games rely on real-time asset loading, making storage choice crucial for optimal gaming. A slow SSD or HDD can lead to long loading times and performance issues. 1. Disabling NTFS Last Access Time can improve loading speeds by reducing disk overhead. This can be done via Command Prompt with the command: fsutil behavior set disablelastaccess 1. 2. Enabling Large System Cache can enhance performance for games with substantial assets, requiring at least 16 GB of RAM and editing the Windows Registry. 3. Disabling antivirus scanning for the game folder can reduce loading times by preventing real-time scans. This can be done through Windows Security settings. 4. Using an exFAT drive can efficiently process large files, which may benefit games with sizable assets. This involves creating a new volume in Disk Management. 5. Disabling Full-Screen Optimizations can reduce input lag and improve performance by changing settings in the game's executable properties. 6. Increasing Shader Cache Size can improve loading times, with Nvidia users advised to set it to 10 GB or Unlimited in the Nvidia Control Panel. 7. Using a third-party cache management program like PrimoCache can enhance loading times by reserving RAM for caching frequently used programs.

Winsage

March 8, 2025

Microsoft lists a reason why you should update to Windows 11 from 10 via clean install

Microsoft is encouraging users to transition from Windows 10 to Windows 11, which currently holds a market share of 38% compared to Windows 10's nearly 60%. In February 2024, Microsoft launched a promotional campaign to highlight the benefits of Windows 11, and by June, it aimed to dispel myths about the new operating system. The company emphasized security features, particularly the Smart App Control feature in Windows 11, which helps protect against potentially unwanted applications (PUAs). The updated support page for Windows 11 includes recommendations such as downloading apps from trusted sources, using updated antivirus software, and keeping devices up-to-date. Smart App Control requires a clean installation of Windows 11, and users upgrading from Windows 10 must perform a reset, as an in-place upgrade is not sufficient.

Tech Optimizer

March 5, 2025

Microsoft Defender with Windows OS Bundling Not Abuse of Dominance: CCI

The Competition Commission of India (CCI) ruled that Microsoft Defender Antivirus, which has been the default antivirus software in Windows since 2015, does not constitute an abuse of dominant position under Section 4 of the Competition Act, 2002. The case was initiated by an anonymous informant, XYZ, who claimed that Microsoft's pre-installed Defender created barriers for third-party antivirus developers. The informant identified three challenges faced by these developers: the need for one-sided agreements to access Microsoft's Antimalware API, limited access to the Windows ecosystem, and the inability to operate efficiently without being set as the default application. Microsoft defended its position by stating that Defender is an integrated feature of Windows provided at no extra cost, and users can install third-party solutions freely. The CCI found no evidence of coercion or violation of the Competition Act, noting that the cybersecurity sector remains competitive and innovative. The CCI ultimately dismissed the claims against Microsoft, stating that the informant did not establish a prima facie case for action.

Tech Optimizer

March 4, 2025

CCI Dismisses antitrust complaint against Microsoft over bundled antivirus software

The Competition Commission of India (CCI) dismissed an antitrust complaint against Microsoft regarding the bundling of Microsoft Defender antivirus with Windows operating systems, citing a lack of prima facie evidence of anti-competitive behavior. The complaint claimed that Microsoft's practices marginalized third-party antivirus providers and created barriers to entry for competing software developers. Microsoft defended its actions by stating that Defender is a built-in feature for user security and that users can install alternative antivirus solutions. The CCI concluded that Microsoft’s integration of Defender does not impose unfair conditions on users or hinder competition, as alternative antivirus software remains available and competitors continue to thrive. The commission found no violation of Section 4 of the Competition Act and closed the case, granting confidentiality to the informant and certain documents for three years.

Winsage

February 6, 2025

Microsoft script updates bootable media for BlackLotus bootkit fixes

Microsoft has released a PowerShell script to help users and administrators update bootable media, integrating the "Windows UEFI CA 2023" certificate. This update is in response to the BlackLotus UEFI bootkit, which can bypass Secure Boot and disable Windows security features. Microsoft has issued prior updates in March 2023 and plans additional measures for July 2024, addressing a Secure Boot bypass vulnerability (CVE-2023-24932). The fix will be rolled out in phases before full enforcement anticipated by 2026. The update will include the "Windows UEFI CA 2023" certificate in the UEFI Secure Boot Signature Database and revoke the "Windows Production CA 2011" certificate for older boot managers. Administrators are advised to update bootable media to use the new certificate to avoid booting issues. The PowerShell script is compatible with various media formats and requires the Windows ADK for functionality. Microsoft recommends thorough testing before the enforcement phase, which will begin by the end of 2026, with a six-month notice prior to implementation.