1.There are many signs that tell you when you are being hacked, for instance unwanted browser toolbars, redirect internet searches, and frquent random popups.

2.There are many ways to avoid being hacked such as, being suspicious of emails,and checking link locations. Also when you are using public wifi, do not share personal informaion.

3.After you are hacked you should scan your drive for infection and Malware immediately,and change your passwords to stronger ones.