How does Australian Federal Police (AFP) Ukash Virus snaeak into my system?

(AFP)Australian Federal Police Ukash Virus can infect computers in various ways.

1- Can be downloaded via malicicus drive-by-download scripts from corrupted porn and shareware/ freeware websites;

2 – Can be installed through spam email attachments;

3- Can lurk into target PC via media downloads and social networks;

4- Can be executed by other threats on system

How to avoid being entangled by virus like AFP Ukash Virus ?

1- Be cautious when clicking some link.

2- Do not download unknown “FREE” software

3- Avoid opening unknown e-mail attachments