Scammers are pretending to be from Microsoft, McAfee, and Norton to target users with fake antivirus billing renewals in a large-scale email campaign. The emails pretend to be billing notices from Norton Lifelock, Microsoft, and McAfee that state the recipient will be charged between $350 to $399 for a three-year subscription unless they call to cancel the subscription. When users call into the included phone numbers, the scammers will install various remote access software that threat actors will use to install malware on the computer.
Source: https://www.bleepingcomputer.com/news/security/tech-support-scammers-lure-victims-with-fake-antivirus-billing-emails/