Today I reinstalled my OS (Win7).However, 10 minutes ago I tried to enter a website and my antivirus(Nod32) immediately detected a trojan virus (the name of the trojan is "TrojanDownloader.Iframe.NKE") ,without letting me enter into the site.A message appeared that the file has been quarantined.I made a full scan on my laptop and there wasn't anything detected.Was the virus even downloaded to my laptop or it was quarantined before that?Should I reinstall my OS again and do I have many infected files, or everything is ok?The problem is that I want to put one very important mp3 song on my phone and I am afraid not to put that virus to my phone through the song.Thank you.