For a lightweight antivirus solution that provides good protection for your laptop with an Intel Celeron N4000 processor and 4GB RAM, I would recommend considering the following options:
1. Windows Defender (Microsoft Defender Antivirus): This is the built-in antivirus solution that comes with Windows 11. It offers real-time protection against malware, viruses, and other threats. Windows Defender is lightweight, doesn't consume much system resources, and receives regular updates from Microsoft to keep it effective against the latest threats.
2. Avast Free Antivirus: Avast is a popular free antivirus software that offers a good balance between protection and system performance. It provides real-time protection, scans for malware, and includes additional features like a network security scanner and a password manager. Avast has a relatively low impact on system resources, making it suitable for your laptop's specifications.
3. Bitdefender Antivirus Free Edition: Bitdefender is known for its excellent malware detection rates and minimal impact on system performance. The free edition provides real-time protection, on-demand scanning, and automatic updates. It's designed to be lightweight and unobtrusive, making it a good choice for your low-spec laptop.
4. Avira Free Security: Avira is another lightweight antivirus solution that offers reliable protection. It includes real-time malware scanning, web protection, and a VPN (Virtual Private Network) for secure browsing. Avira has a small footprint and should run smoothly on your system.
Remember that while these antivirus solutions are lightweight, they still offer effective protection. However, it's important to note that no antivirus can provide 100% protection against all threats. It's always a good idea to practice safe browsing habits, keep your operating system and software up to date, and regularly back up your important files to ensure comprehensive security.