So, 2 infected files are in the chest. Now what?

So I ran a scan and found 2 infected files. They are now in the chest, but when I clicked “delete” it asked me if I wanted to delete them from the chest. I didn’t know what that meant, and I didn’t want to put them back onto the computer where they could, well, eff up my stuff. So… what do I do with them now?

thanks!

Clean quarantine or delete http://antivirus.about.com/b/2007/03/11/clean-quarantine-or-delete.htm

How to use virus chest http://www.avast.com/faq.php?article=AVKB21#artTitle