My fairly new PC w/vista was recently infected and I had a shop clean it out and reinstall Vista. I burned onto a dvd the few documents, pictures, and music I had before dropping off the laptop. After the reinstall was completed, I scanned the dvd with Spybot and the scan log was divided into 2 sections. The first section was malware and it showed no problems. The 2nd section was titled heuristic and it listed a few jpgs and mp3s with RED X's and "smitfraud-c". Should I be concerned about these?