A trojan horse is a type of malware that inserts itself into a computer system program and multiplies, in order to interfere with the normal performance of the program. Infections are normally spread out by execution of contaminated programs or accessories, and frequently masquerade as legitimate files in order to trick users into opening them. The most typical kind of bug is the boot sector infection, which infects the master boot record (MBR) of a computer worm definition - knowing it,'s disk drive. This kind of virus is especially difficult to remove, 20 types of computer viruses (telegra.ph) as it can contaminate the system's boot sector, making it impossible to boot up the infected computer system. Other typical types of infections consist of file-infecting infections, email viruses, macro infections, and types of viruses in network security - mouse click the up coming website - rootkits.