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Microsoft: No need to install additional antivirus programs on Windows 11.

Microsoft has officially confirmed in a recent blog post that Windows 11 users do not need to install third-party antivirus software in most cases. According to the company, users only need to keep (not disable) the default settings of Microsoft Defender and update it regularly; this built-in antivirus tool is sufficient to protect users against common threats.

Báo Cần ThơBáo Cần Thơ27/04/2026

For many years, the question of whether or not to install additional antivirus software has been a concern for Windows users. However, Microsoft has made it clear that Microsoft Defender – the antivirus software built into the operating system – can adequately meet the needs of most individual users.

The company also emphasized that Windows 11 is the most secure version of Windows to date, partly thanks to the antivirus software deeply integrated into the operating system. Microsoft Defender is enabled by default, runs continuously, and regularly receives updates to combat new threats.

According to Microsoft, Microsoft Defender effectively protects against common threats such as malware and phishing websites, especially when combined with Microsoft SmartScreen. Users can significantly reduce risks simply by keeping their computers updated and being cautious when downloading content from the internet.

However, Microsoft also acknowledges that in some cases, Microsoft Defender may not be robust enough. Advanced users, those managing multiple devices, sharing computers with family members, or those needing additional features such as identity monitoring or parental controls may consider using third-party antivirus software. In enterprise environments, where centralized management and enhanced threat monitoring are required to protect sensitive data, dedicated security solutions remain crucial.

Microsoft also notes that if users choose to install additional antivirus software, they should carefully consider the pros and cons. These programs can consume additional system resources such as RAM and CPU, and may even conflict with Microsoft Defender. Running multiple real-time scans simultaneously can lead to unstable performance. Therefore, users should only use one real-time antivirus program to ensure optimal computer performance and stability.

LE PHI (According to PCWorld, BGR)

Source: https://baocantho.com.vn/microsoft-khong-can-cai-dat-them-chuong-trinh-diet-virus-บน-windows-11-a203231.html


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