Free antivirus software typically offers a basic level of protection against malware, including virus and spyware removal. However, free antivirus software may not offer other features that can enhance your security, such as firewalls, parental controls, identity theft protection, VPNs, backup software, and online storage.
For years, I've relied on Avast Ultimate, a premium product, to protect my family's devices (PCs and smartphones). It helped me maintain their devices, like automatic software updates, so I check less on them. Yet, opting for a premium suite isn't always advantageous as it may involve complex settings that are difficult for users to grasp. Now, let's get back to what you need.
I use avast one free for my daily driver's mini PC and it's sufficient.