Antivirus are small software programs that are designed to spread from one computer to an alternative and to interfere with computer operation.
A virus might.. corrupt or delete data on your computer, use your e-mail routine to spread itself to be able to other computers, or even erase everything on your hard disk.
Antivirus are often spread by attachments in e-mail communications or instant messaging email. That is why from your that you never open e-mail attachments should you not know who it’s from and you just are expecting it.