Opera Sync allows users to synchronize their data and preferences across different devices . It is a feature offered by most browsers and others as extensions. It is useful and serves to save a lot of time.
The WhatsApp application for Windows and Mac is an extension of what we have in mobile, being necessary to synchronize the same way we do with the web version: scan the QR code and see the conversations.
Brain is the first computer virus was merely to replicate, not erase anything, not copy private data, only replicated. the virus was not hiding at all who had created it, indicated it perfectly in their code.