(adsbygoogle = window.adsbygoogle || []).push({}); hi i use windows 7 and i have a question about Antivirus programm

what is the best security for computer 2013?

Are you wanting free antivirus or Payed?
If you are wanting free Check out Malware Bytes Anti Malware, or Avira Antivirus.
MBAM has a paid version witch is pretty good.
Also Kaspersky is very good (Thats what I hear)