I wanted to do a simple test of antivirus software. That's what I did: 1.Took a simple .exe file made in C++ (basically displays just some text) and uploaded to virustotal. No threat found. (you can try it yourself http://rapidshare.de/files/39365744/test1.exe.html) 1-b.Took the file again 2.Compressed it with PECompact 3.Put it in a zip file 4.Uploaded to VirustTotal.com The result EC edit: Removed virus total results. Please read our TOS. 3 Anti viruses report the file as suspicious, probably only because it has been compressed. And guess what? PrevX, the famous virus scanning, company flagged my file as malicious. Got the same result with other C++ file treated in the same way. Now, it's good that antiviruses are having strong heuristics, but aren't they just too much paranoid?