How does malware spread?

Related questions

1. Can you get malware from YouTube?
2. Can malware spread through network?
3. How do malware worms spread?
4. Can hackers use ports to spread malware?
5. Can watching YouTube videos give you viruses?
6. Is the mp3 free to use?
7. Can you get a virus from opening a video?
8. How do I download YouTube videos to my mp3 player for free?
9. Is YouTube mp3 safe?

Tags

1. #using
2. #viruses
3. #common
4. #systems
5. #computer
6. #spyware
7. #including
8. #these
9. #instant
10. #worms
11. #messaging
12. #malware
13. #spread
14. #trojans
15. #client
16. #sharing
17. #activities
18. #online