change the extension should work. Those rules are in place to prevent the stupid user from accedentely opening viruses. Know I don't know but if you have to extract it and then execute it and it's from a person you most likely never heard from and it's a virus you are just a plain old idiot.
my 2 cents.
And there's plenty of them idiots out there...
Did you know that there are actually tons of fools who reply to and get excited about the email about penis enlargement?
I think they're still sitting at their computers with a USB cable wrapped around their slong, waiting for a 'connection!'
my 2 1/2 cents