Your computer should be protected from virus, malware and various kinds of online threats. The infected code can spread through various sources. If you insert a memory stick, the anti-virus software should be able to detect malicious code and it should be blocked immediately. Similarly, when your computer is connected to internet, it will be vulnerable to various kinds of threats. Hence reputed anti-virus software should be installed and it should be updated at regular intervals. The latest threats should be detected and arrested by the anti-virus and anti-malware software. Online virus protection software can be installed in this direction.