Yes and no: a free antivirus can offer protection against the Geek Squad scam, and companies like Norton and Bitdefender offer excellent free web protection tools. However, they won’t protect you from every type of Geek Squad scam.
Furthermore, free antiviruses will usually be less powerful than their premium counterparts — on top of that, less reputable companies will lie about how good their malware scanners are. Plus, free products lack most of the extra features that protect you online, like a firewall, a VPN, a dark web monitor, or any other features you’d get in a premium suite like Norton.