Because just like viruses in humans, they can pass from computer to computer, being "contagious" in a manner.Plus it ruins your computer like it ruins a body
A virus can be sneaky and mostly the reason why a virus hacks your computer is because they want you to buy their product .About 4 months ago i had a computer virus on my computer called security...
first of all, if you don't have a virus scaner that is your problem. Computer viruses usually get in by the internet. like unwanted cookies. every 8 minutes without a virus scanner and your on the...