how can I get those things installed.
I presume you mean the Anti-Virus Applications not the game !?!
Just buy the Antivirus App and install it by following the prompts !
I use Nortons Internet Security & It cost me about $30AUD ($20USD) through e-Bay
Dont get Nortons Antivirus as you will miss out on all the internet features and they cost the same !
They do have a thing called Nortons 360, But I always get Internet Security as I don't use the extra features.
Simple to install if you know how, if not just get one of those cheap techies to come out and install it for you, should cost you about $15USD