I’m still new and learning all about my Mac! I would so appreciate some help on how to get rid of them and anything they might leave behind, or would just sending them to the trash be good enough? I am also wondering how to know if I do have a virus on here. that’s what my son is telling me at this point. I have 4 files that I have no idea where they came from … I am extremely cautious about downloading anything on here, but yesterday I was having trouble trying to update my flash player in Firefox, and I may possibly have accidentally downloaded the Windows version.