In fact, you can sort of see the files packed inside the 400 megs executable, they're visible at the end of the exe file (file names are encoded as UTF-16 so i forced Total Commander's text viewer to show them by making it think the whole file is UTF-16 encoded, that's why you see all kinds of weird characters) : So you can see that one of the first files packed in this executable is vegas140\ac3studioplug.cab and the signature for this CAB file is what 7zip detects (incorrectly). ![]() ![]() It just so happens that this installer contains a CAB file which contains the installer for that AC3 plugin/codec and the signature of that package is what 7zip detects and makes it to incorrectly assume that's where the archive starts. When you give 7Zip some random executable, it tries to determine if it's a self-extract archive by searching for a pattern, a series of bytes, a signature which tells it what kind of archive it is. There's nothing wrong with the installer, it's 7Zip that screws up and incorrectly thinks that the executable is compressed with MSZip algorithm (the compression used in Microsoft CAB files).
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