le sigh,
Golden rule 1: Never click on suspicious e-mails or links.
Golden rule 2: If somebody on the internet tells you to either click on or download something, and said person is not either
A. Some kind of tech support or employee from a reputable company.
B. Somebody you know EXTREMELY well.
C. Any sort of reputable source.
Don't do it. Unless you know what you are getting into, just don't.
Golden Rule 3: Always make sure your system and software are updated. This includes Anti-virus and firewall software. Also, make sure your system is configured properly. Your computer is not a barn, so don't leave doors open.
..Do I even have to finish making my point? bonus dunce points if you follow the advice of anyone on 4chan.