Antivirus is a software which is used to prevent, detect, and remove spyware, malware and many types of viruses. Without antivirus software, viruses will infect your computer. Viruses infect other files it can be disguised as attachments of funny images, greeting cards, or audio and video files., Worms make copies of themselves, Trojans perform malicious actions but do not spread. Antivirus searches a hard disk for viruses and removes any that are found. So, installing antivirus software is a...