Does my computer have a virus?

I downloaded the SNES emulator SNES9x from CoolROMs.com for about a week and then deleted it. I also downloaded a few ROMS for it an deleted those as well. However, I've noticed that in my program files there are files with the SNES9x icon that pertain to different programs. Ex: In my itunes folder there are 3 files that have the SNES9x icon but are labeled the actual program name (IpodUpadaterExt, ItunesMiniplayer, ItunesOutlookAddin). I haven't noticed any serious slowing down of my computer, popups, or errors...however, just the fact that these icons are all over my computers ProgramFiles, ProgramFile(x86), and Windows folders makes me uncomfortable. Again, no serious slowing down, errors, or random shutdowns, but is it worth spending some money to have it looked at. Also, i have Avast Free Antivirus and it hasn't picked up any virus. However, I understand it's only a free version and not as effective as the pro versions.