Hi, i hope i'm not going to cause any concern or alarm to other people for this thread, but i need advice yet again. I used a link from a thread for a online scanning service called VirusTotal, after scanning some suspect files i decided to give some of the free programs i downloaded from Afterdawn a scan, here are some of the results. ffdshow_rev1625_20071119_clsid.zi Prevx1 V2 2007.12.18 Heuristic: Suspicious Self Modifying TMPGEnc-2_1_.524.63.181-Free.zip Sunbelt - - VIPRE.Suspicious Webwasher-Gateway - - Win32.Malware.gen (suspicious dvdshrink32setup.exe Webwasher-Gateway - - BlockReason.0 Avisynth_257.exe eSafe - - suspicious Trojan/Worm Panda - - Suspicious file GSpot270a.zip Webwasher-Gateway - - BlockReason.0 FixVTS.exe McAfee - - New Malware.ab dvdflick_setup_220.127.116.11.exe Prevx1 - - Heuristic: Suspicious Self Modifying File DVDFabHDDecrypter4012.exe Prevx1 - - Heuristic: Suspicious Self Modifying File avidemux_2.3.0_plus_win32.zip Fortinet - - suspicious Panda - - Suspicious file vsoConvertXtoDVD2_setup.exe IkarusVirus.Trojan.Win32.Obfuscated.en I'm not sure of these results, the one i really need some advice about and which i can't seem to find any information on is the "Heuristic: Suspicious Self Modifying File". This was found by the Prevx1 scan which is a new program in the beta stage designed to find the newer Trojans and has also given the these names for the same result, "Heuristic: Suspicious Backdoor" "Polymorphic Trojans" found in DVDflick_setup_18.104.22.168.exe , ffdshow_rev1625_20071119_clsid.zi , DVDFabHDDecrypter4012.exe I've never found any of this infections with all of the security programs i've used but would appreciate any input, even my favourite program ConvertXToDVD has been infected with "Trojan.Win32.Obfuscated.en" found by the Ikarus scan according to VirusTotal. Could i have a Trojan spreading through my files, the Polymorphic Trojan?