mcafee probably misses the trojans because the files that are being found on your other virus scanners are probably suspicious files. this does not mean that they are infected and it does not mean that they are not. mcafee will only find infected files rather than suspicious. you should download a trojan scanner anyway. this same thing happened to me with F-Prot 3.11. F-Prot 3.11's on demand scanner detected 8 suspicious files and mcafee only found one that was infected with the NetBus Pro trojan. either that or it is that you don't have your virus DATS up to date. use instant updater to find updates and download an anti-trojan program like Tauscan, or The Cleaner.