Honestly if you have Windows Defender, don't bother with McAfee. It is slower, doesn't catch anything more than what Windows Defender would catch. Adding 3rd party virus scanners make your system more at risk than if you didn't have one.
Use Windows Defender, put UBlock Origin (ad blocker) on your browser, use OpenDNS on your router and you will have blocked almost every attack out there. The risks here are opening attachments from unknown people and clicking links in email from unknown people or those pretending to be real companies.