TYPES OF VIRUS
· Boot Virus
These are one of the most dangerous viruses in terms of the damage they cause to the system. They infect the boot sector of the disk. The boot sector is the region which stores the information associated with disk (headers, inode, addresses etc.) and thus makes the booting procedure possible. If this virus infects the system then in most of the cases formatting the system is the only solution left.
These are the virus which spread very easily over the network. They change the path defining the location of a file/program or an application. So when a user executes an infected file then he/she basically gives a call to virus unknowingly which further infects the system. They tend to delete/move the original files in most of the cases.
They are the self evolving viruses. Every time they infect a new system they reinvent themselves and infects them in a new manner (they use different algorithms and encryption keys) thus making it tough for an antivirus to detect them.
If you use internet then you would have encountered these viruses. Whenever one gets a pop up to download applications for free (free scanner, free antivirus, free wallpapers apps etc) then there is very high probability that user might be downloading an infected executable file (.exe or .com). So when a user executes these applications, he/she give a green signal to virus infected file to cause the damage to the system.
As clear from its name, these viruses infects the system, corrupt the data if and only if certain conditions are met that is logic is met. They remain undetected until they become active, hence are difficult to be detected by antivirus.
· Network Virus
Protection & FAQs