Norton Security Check is a free online service which tests your computer’s exposure to a wide range of online threats. If you don’t have any antivirus or malware detection software installed, then using this free online service will give your system a through scan to find out if it is infected with any malware or virus. It also helps in determining the internet security needs.
This service is extremely fast and conducts five main tests while scanning your system. It performs the Hacker Exposure Check(Tests TCP ports in this phase), Windows Vulnerability Check(Checks whether network settings are secure or not), Trojan Horse Check(Checks for Trojan horses), Anti-virus Product Check ( Checks installed anti-virus products), and finally the Virus Protection Update Check(Checks whether your anti-virus definitions are up-to-date or not).
To begin, launch the site and hit the Start button under the Security Scan or Virus Detection, depending on what you want to run.
It is an extremely fast service, and hardly takes a minute(depending upon your internet connection).