Anti-virus recommendations

[Yelcamino]

I'm currently using Verizon DSL and recently got an email saying they will no longer provide online protection starting 8 Dec.

They do offer their Internet Security Suite for an additional $5.99 per month. Obviously that would be the easiest way to keep my computer safe, but is it the most cost effective way?

Are there any free programs that are worthwhile? What do you guys use?

Thanks!