I am new to apple (switched from windows) and when I try to shutdown I get the message that Mail is open and stopping shutdown however it is not open!! I get round this by constantly retrying etc until the computer shuts down however this is frustrating as the machine is less than 2 weeks old and I was promised 'a brave new world of computing'. Any help gratefully received but not to much jargon as I am in my late 60's and just a wee bit afraid of the machine right now