What Are Computer Viruses?

They are awful. They make your computer shut off and crash and it's very annoying.

Virus is a software program that can effect or enter in your computer
without permission. It can copy itself and increase automatically.
Mainly its come through Internet and unknown and using infected flash
drive. A computer virus may corrupt or delete data on a computer.
Evan small virus is dangerous because keep consuming all available
memory.

Computer Viruses are simply malicious programs meant to achieve the goals of the programmer.  These goals could range from using your computer's resources to turn their computer into a virtual supercomputer, to being annoying (ie the ambulance virus where an ambulance drives across your screen every few minutes), to shutting down your system, to stealing your personal information.  The trick these programmers use is they imbed the program in an internet popup or ad so when you click to redeem your free laptop, you actually get a virus.

They are these things they get on ur computer if u download something with a virus so  be careful they make u lose progress in anything they even shut down ur computer (thats how u lose progress with viruses) and they delete files and programs and stuff its awful u should download mcaffee that is a program thats keeps u safe from viruses i downloaded it like 2 years ago but its still good cuz then u wont get viruses (u can notice them if ur computer is slow bcuz usually ur computer gets slow by viruses)