I recently transferred an old hard drive to a newer PC. The old HD was a data drive from the old PC. After scanning it, I found a few problems I'm a little (lot) worried about. My antivirus software found backdoor.bifrose and a generic trojan horse in a couple of .exe files on the old hard drive. Backdoor.bifrose was in a keygen and the generic trojan horse was in some .exe I must have downloaded years ago but never used. I never ran either .exe after transferring the HD to the new PC. In fact, I didn't even know they were there - my AV software found them in the scan buried among the data on the drive. After discovering the problems, my AV software attempted to quarantine both. It was sucessful with one but not the other. However, I simply found the file on the drive and deleted it manually. I then deleted the quarantined file through the AV. Also, I followed Symantec's advice (I use Norton) and checked for instances of the trojan horses in my running processes. I didn't find anything. I then re-scanned the new HD and the AV software didn't find any problems. I'm under the impression that neither of these should be an issue, given I never actually ran the .exe file. However, I'm very paranoid about my data being spread about the internet (I try to be dilligent about PC security), so I thought I would seek out a few opinions. Any help anyone can offer would be GREATLY appreciated.