Norton.com/setup - In the digital world where we live today, computers, smartphones, tablets and other gadgets have become necessities. Moreover, the dependence on the Internet is increasing day by day along with the dangers associated with it. No matter how careful and cautious you are while using the computer and Internet, you are not safe from the risks of cybercrime and infections. Threats of viruses and malware are increasing day by day. Antivirus software is an essential tool at present. Antivirus software scans the computer and other devices for infections and threats and matches them with its database of known viruses. If any match is found, antivirus software quarantines that file and removes it from the device.