I would recommend using a business-class antivirus rather than the consumer editions.  Also, don&#x27;t use their browser plugins if offered.<p>At least that protects you from theft.  I can keep all my files backed up, but that doesn&#x27;t protect the data in them from being compromised.<p>If anything, you need to start recommending encryption to your friends if they aren&#x27;t going to use an Antivirus.