Just for the sake of completeness: Today, the installation was carried out to the end under Windows7, even if it still hangs a while while "Verifying Apache Flex SDK MD5 Signature".
But after the installation was finished, our company virus scanner exiles the entire installer.exe for whatever reason. However, I guess the installer is ok ;-) On my private Windows10 machine it works like a charm! Thanks! Olaf -- Sent from: http://apache-flex-development.2333347.n4.nabble.com/