In computer science, a virus can spread from one computer to another through different ways, just like how germs spread between people. It often enters when we open or download something unsafe, and once inside, it can damage files or copy itself to other computers. That’s why we should be careful online and use antivirus protection.Examples of how computer viruses spread:Email attachments – Opening unknown or suspicious email files.USB flash drives – Plugging in infected storage devices from other computers.Fake software downloads – Downloading games, apps, or tools from unsafe websites.Clicking suspicious links – Visiting strange websites or pop-up ads.File sharing over networks – Sharing files from one infected computer to others.