How to determine if the McAfee warning is real?
If a user is seeing a fake McAfee virus warning in a browser like the one in the screenshot below, the McAfee virus scan warning is not real: The website in the above image is mcafeevirusremover.com that is not maintained or registered by the real McAfee.com website. The mcafeevirusremover.com is a rogue website, or fake scanner webpage. If the user clicks on "Remove all" button, the browser will download a Trojan and if the person executes the Trojan file, the Security Tool rogue program will be installed.
Scammers will use other methods to infect computers. They will use legitimate product names to mislead people so they trap many victims.
Sending out spam using McAfee Virus Scan Plus as the subject of the message is another trap to avoid:
Subject: “McAfee VirusScan Plus"
Message body: “Download a FREE 30-day Trial of MCAfee VirusScan Plus and Be Automaticaly Entered to Win.
Installation file attached"
Note the difference of the spelling of McAfee in the body of spam message. The legitimate McAfee product is never spelled MCAfee. As McAfee Avert Labs has said in their blog: "Another point is the attachment–we don’t send setup files for our products as email attachments". Obviously, it is a bogus message and will infect computers that execute the attachment in the spam message.