What is it?
Malware is short for malicious software. What it does is it sends a computer program into your computer, and will allow the hacker to aces personal information.
How Does it Happen?
You usually get a virus from going on to an unusual website that has a link to somewhere, or something like a game that sends a virus to your computer. You can also get one from an e-mail that has an unusual attachment.
How to avoid it.
Some of the best ways to avoid it would be to get an anti-virus software. Another way would be to have a fire wall installed, and just using common sense.