Trojan Virus Notification

All such messages are scams presented by criminals. Close the offending page and avoid sites that are involved in such bogus advertising tactics. Do not interact with the message. Do not download anything based on such bogus messages.

Phony "tech support" / "ransomware" popup… - Apple Community

You were not sent to an Apple website.

You tapped on a malicious ad designed to scare you into buying useless software at best, at worst steal your money and data.

Any such pop ups should be ignored.

Either stop going to sites that serve those ads or install an ad blocker.

You are welcome. Declining to download software is the appropriate step.