Piracy is not to be discussed on this forum. That includes torrenrs, warez, etc. Guess I forgot to add that to my list of rules.
Regarding your AV, KIS 2009 is the best in the business. With that, you will not need any other security software, like firewall, anti-spyware, etc. as KIS is all in one.
But, as you have downloaded it from a torrent, it will work till the Serial key you used is blacklisted, and thus, you wont be able to run it when it's blacklisted, rendering it useless.
You can buy 1 year of security of KIS 2009 at prices ranging from 400/0 to 800/- Rs. (based on bargaining skills/ on site promotions, etc)