For those navigating the digital landscape, whether as newcomers or seasoned veterans, the question of whether an antivirus program is necessary for a Windows 11 computer is one that warrants serious consideration. The unequivocal answer is yes—always yes. With Windows 11 accounting for nearly 44% of global desktop users as of April 2025, the operating system has become a prime target for cybercriminals. A staggering 83% of malware in 2020 was aimed at Windows systems, underscoring the importance of robust cybersecurity measures.
What does Microsoft Defender offer?
Microsoft Defender comes pre-installed and automatically activated with Windows 11, making it an accessible choice for users who may prefer to avoid the complexities of third-party installations. This built-in solution is regularly updated and leverages cloud technology for swift malware detection. Our evaluations have shown that its malware protection is commendable, featuring multiple scanning options, including quick and custom scans.
In addition to its core functionalities, Defender provides essential features such as basic ransomware protection, which safeguards OneDrive files from unauthorized alterations. The SmartScreen feature integrated into the Edge browser serves as a valuable anti-phishing tool, alerting users to potentially harmful websites or downloads. While it can be bypassed, it acts as a crucial warning mechanism.
Defender also includes a firewall that monitors network traffic, shielding devices from malicious applications and unauthorized access attempts. This firewall can be tailored to user preferences, automatically blocking any suspicious connection attempts. Additional offerings encompass a password manager for Edge, parental controls to manage screen time, app control to restrict unsigned applications, and options for VPN and identity protection. However, as with many free solutions, some features may be limited or require additional fees.
Why should you add additional antivirus software?
While Microsoft Defender establishes a solid foundation for your Windows 11 security, it is often regarded as just the starting point. The responsibility for maintaining safety largely rests with the user, particularly when it comes to adhering to sound cybersecurity practices. This includes being vigilant about the websites visited and the files downloaded.
Opting for third-party antivirus software can enhance your security posture significantly. These solutions typically offer more comprehensive protection, anticipating and neutralizing malware threats more effectively. They often come bundled with features that cater to entire households or multiple devices, providing a more holistic approach to cybersecurity.
Renowned antivirus programs from companies like Norton or Bitdefender may include superior parental controls, integrated VPN services, and password managers that function across various browsers—not just Edge. Additional features such as identity theft protection, file shredders, and webcam blockers can further bolster your defenses.
Regardless of your choice—whether you stick with the built-in Microsoft Defender, opt for a third-party solution, or employ both—ensuring that your Windows 11 computer is equipped with a reliable antivirus program is non-negotiable. While setting up and configuring these tools may require some initial effort, the peace of mind they provide is invaluable compared to the potential chaos of dealing with a virus or a data breach.
