What is Computer Virus.?
Computer viruses are small software programs that are designed to spread from one computer to another and to interfere with computer operation.:)
What do computer viruses do?
Through the course of using the Internet and your computer, you may have come in to contact with computer viruses. Many computer viruses are stopped before they can start, but there is still an ever growing concern as to what do computer viruses do and the list of common computer virus symptoms. A computer virus might corrupt or delete data on your computer, use your email program to spread itself to other computers, or even erase everything on your hard disk.
Computer viruses are often spread by attachments in email messages or instant messaging messages. That is why it is essential that you never open email attachments unless you know who it's from and you are expecting it.
Viruses can be disguised as attachments of funny images, greeting cards, or audio and video files.
Computer viruses also spread through downloads on the Internet. They can be hidden in illicit software or other files or programs you might download. Source: Virus
AntiVirus
Antivirus (or "anti-virus") software is a class of program that searches your hard drive and floppy disks for any known or potential viruses.
The label "antivirus" was originally given to programs that identified and removed a particular type of malware called a virus. Today, however, antivirus programs are useful for preventing infections caused by many types of malware, including worms, Trojan horses, rootkits, spyware, keyloggers, ransomware and adware.