no wait, its nothing to do with his operating system,its to do with his antivirus.
i used to get this message, it was a real pain in the ass
i think he might have AVG, if not its still his antivirus,
all you have to do is disable your antivirus then download the hack again, when it is downloaded, turn it back on again.
NOTE: oh if ur using AVG, then u HAVE to UNINSTALL ur antivirus not turn it off
then when the hack is downloaded, install ti again. Then i assure u it will deffinately work.
SECOND NOTE: AVG IS ABSOLUTELY SHIT