An antivirus like Norton will provide you with real-time protection against email malware. Whenever you attempt to download a malicious attachment, Norton’s real-time protection will kick in, scan it automatically, and prevent malware from being installed on your device.
That said, it’s still best to be vigilant; if you have any worries about an email, it’s best to err on the side of caution and not to interact with it at all. If you received a suspicious email from the Geek Squad, it’s worth checking out this guide to see if it’s safe before opening it.