Old Downloads On Computer Now Threats On My Computer, Can’t Find Them Please Help!?

Well about a few months ago I downloaded some “macros” for my video game “Battlefield 2″ I was using my crappy computer and in the “game-world” you shouldn’t get a macro from someone you don’t know, I didn’t listen to that and I got 10 macros download files from some guy. At the time I didn’t care because I thought that I would get a new pc soon, but turns out I’ll be stuck with this same one for another year.
Every time my security “norton” does their own scan I get threats detected and I view them, and they are the macro downloaded files I downloaded a long time ago, problem is I can’t locate them because I swear I deleted them.
How can I find them and remove them from my computer?