Free software has to be paid for somehow. Usually, this means:
You will see occasional prompts to buy the "Pro" version. Free Antivirus Software You Can Protect Yourself With
Excellent at catching "zero-day" (brand new) threats and fileless malware. Free software has to be paid for somehow
Bitdefender is consistently ranked at the top of independent lab tests for malware detection. or identity theft protection.
Kaspersky is widely regarded as having some of the most sophisticated detection technology in the industry.
If you use Windows, you already have this. It has evolved from a basic scanner into a top-tier security tool.
You won't get "premium" features like a VPN, parental controls, or identity theft protection.