I believe what was said was that it could be impossible to trace a viri back, and yes those headers. Then again how about all the news on the Viri sites and media about Klez, those are impossible to find LOL NOT. Try keeping up on viri news or even current web events, read, read read and learn about all the new viri and their signatures (as in published reports) try to remember some of them so when your system (s) start to do funny things you have a direction to go in. One would have to be pretty out of touch not hear anything about Klez. So don;t go off on people here. First clue as to whom is lame is the lack of information from you and second is to say others here trying to help know nothing, third READ current news and viri site reports.