Hi LIL NOOB, and welcome to the forum.
Firstly, you don't need the heavy blocked text. Normal font will get you the same exellent service we always provide here.
Secondly, take your pick from one of these free alternatives. All good.
Avast Home Version:Antivir:This one not as popular as it used to be:
AVG Free:And have a read of this section of the forum:
http://forum.piriform.com/index.php?showtopic=17628