Frequently Asked Question
Are there different types of viruses?
Plenty. Here are a few samples:
enters your system disguised as something else, like another program.
propagate on their own by hijacking your e-mail accounts, user IDs, file transfer programs, etc.
are placed by a person or another program and activate with a trigger: a certain time or when you open a program or file.
hide on your system and scan the surrounding environment for IP addresses and open ports. Then they make your computer “available” to other malicious code or people.
You can categorize viruses by what they do:
infects the boot sector of disk storage.
infects executable programs.
is a combination of boot and program viruses.
can avoid detection by removing itself from the system registry or masquerading as a system file.
embeds itself into another file or program and leaves the original file functional.
changes its code structure to avoid detection and removal. Like a living virus, it mutates.
exploits the macro language of a program like MS Word or Excel and does serious damage.